E&M TIPERs

ELECTROSTATICS
Ranking Tasks (RT)    
eT1-RT1: Charged Insulating Blocks-Charge Density     
eT1-RT2: Breaking a Charged Insulating Block-Charge Density   
eT1-RT3: Charged Insulating Blocks-Charge     
eT1-RT4: Pairs of Connected Charged Conductors-Charge 
eT1-RT5: Collection of Six Charged Connected Conductors-Charge
eT1-RT6: Pairs of Outside and Inside Connected Charged Conductors-Charge      
eT1-RT7: Charged Rod and Electroscope-Excess charge   
eT3-RT1: Three Dimensional Locations in a Constant Electric Potential-Force   
eT3-RT2: Charges Arranged in a Triangle-Force 
eT3-RT3: Charges in a Plane-Force     
eT3-RT4: Two Charges-Force   
eT3-RT5: Two and Three Charges in a Line-Force       
eT3-RT6: Charged Rods and Point Charges-Force
eT3-RT7: Charged Curved Rod-Force    
eT3-RT8: Three Dimensional Locations Near a Point Charge-Electric Force      
eT3-RT9: Sphere and a Point Charge-Force     
eT3-RT10: Three Dimensional Locations in a Uniform Electric Field-Electric Force     
eT4-RT1: Two Charged Objects-Acceleration    
eT4-RT2: Proton in Magnetic and Electric Fields-Acceleration 
eT4-RT3: Charges Between Charged Parallel Plates-Speed       
eT5-RT1: Charged Insulating Sheets-Electric Field    
eT5-RT2: Changing Electric Force on an Electron-Electric Field       
eT5-RT3: Charged Solid Conducting Sphere-Electric Field      
eT5-RT4: Three Dimensional Locations in a Constant Electric Potential-Field  
eT5-RT5: Spherical Conducting Shell-Electric Field   

eT5-RT6: Six Charges in Three Dimensions-Electric Field
eT5-RT7: Potential Near Charges-Electric Field       
eT5-RT8: Three Charges in a Line-Electric Field      
eT5-RT9: Potential vs Position Graphs-Electric Field 
eT5-RT10: Potential vs Position Graphs-Electric Field
eT5-RT11: Potential vs Position Graph II-Electric Field      
eT5-RT12: Point Charges in Two Dimensions-Electric Field     
eT5-RT13: Electric Field Lines-Electric Field
eT5-RT14: Charged Curved Rod-Electric Field  
eT5-RT15: Three Dimensional Locations Within a Uniform Electric Field-Field  
eT5-RT16: Point Charge inside an Insulating Shell-Electric Field     

eT5-RT17: Point Charge inside a Conducting Shell-Electric Field      
eT5-RT18: Equipotential Surfaces-Electric Field      
eT6-RT1: Three Dimensional Locations in a Constant Electric Potential-Work   
eT6-RT2: Three Charge System-Electric Potential Energy       
eT6-RT3: Electron in Equipotential Surfaces-Kinetic Energy Change    
eT6-RT4: Charges and Equipotentials-Work     
eT8-RT1: Four Charges in Two Dimensions-Electric Potential   
eT8-RT2: Points Near a Pair of Equal Opposite Charges-Potential      
eT8-RT3: Pairs of Charged Connected Conductors-Electric Potential    
eT8-RT4: Charged Curved Rod-Electric Potential       
eT8-RT5: Two Large Charged Parallel Sheets-Potential Difference      
eT8-RT6: Three Dimensional Locations Near a Point Charge-Electric Potential  
eT8-RT7: Three Dimensional Locations in a Uniform Electric Field-Potential   
eT8-RT8: Six Charges in Three Dimensions-Electric Potential  
eT8-RT9: Spherical Conducting Shell-Electric Potential       
eT8-RT10: Systems of Eight Point Charges-Potential   
eT9-RT1: Point Charges-Flux  
eT9-RT2: Charged Insulator and Conductor-Flux
eT9-RT3: Insulator and Conductor-Flux
eT9-RT4: Cubes in Electric Fields-Flux       
eT10-RT1: Charged Rod Near a Suspended Bar Magnet-Torque     

 
Comparison Tasks (CT)
eT1-CT1: Charges in Electric Field-Charge    
eT3-CT1: Straight Charged Rod and Two Point Charges-Force    
eT4-CT1: Cart Approaching Sphere-Distance    
eT5-CT1: Potential Near Charges-Electric Field       
eT5-CT2: Potential vs Position Graph II-Electric Field       
eT6-CT1: Three Charge System-Electric Potential Energy and Work Done 
eT8-CT1: Points Near Pair of Charges-Potential Difference    


Qualitative Reasoning Tasks (QRT)    
eT1-QRT1: Breaking A Charged Insulating Block-Charge and Charge Density      
eT1-QRT2: Charged Insulating Blocks-Original Block   
eT1-QRT3: Charged Insulating Blocks-Charge and Charge Density
eT1-QRT4: Charged Insulating Rod-Charge and Charge Density   
eT1-QRT5: Three Conducting Spheres-Charge    
eT3-QRT1: Two Unequal Charges-Force  
eT3-QRT2: Three Charges in a Line-Force      
eT3-QRT3: Three Charges in a Line-Force      
eT3-QRT4: Three Charges in a Line-Force      
eT3-QRT5: Straight Charged Rod and Two Point Charges-Force   
eT3-QRT6: Charge near Equipotential Surfaces-Force Direction 
eT3-QRT7: Force Direction on Charges in an Equilateral Triangle-Force
eT3-QRT8: Force Direction on Charges in a Right Triangle-Force       
eT3-QRT9: Force Direction on Charges in a Square-Force       
eT3-QRT10: Two Charges-Force on Each 
eT6-QRT1: Two Charged Objects-Work and Energy
eT5-QRT1: Potential vs Position Graphs-Electric Field
eT5-QRT2: Charged Insulating Rods-Electric Field     
eT10-QRT1: Graph of Charge vs Electric Potential-Capacitance 
eT9-QRT1: Charge Within a Hollow Conductor-Flux      


Linked Multiple Choice Tasks (LMCT)  
eT3-LMCT1: Charges Arranged in a Triangle-Force      
eT3-LMCT2: System of Charges-Electric Force on a Charge      
eT3-LMCT3: Straight Charged Rod and Two Point Charges-Force  
eT3-LMCT4: Sphere and a Point Charge-Force   
eT3-LMCT5: Positive Charge in a Uniform Electric Field-Electric Force
eT3-LMCT6: Potential vs Position Graph II-Force      
eT5-LMCT1: Charged Insulating Sheets-Electric Field  
eT7-LMCT1: Six Charges in Three Dimensions-Field and Potential at Origin     
eT7-LMCT2: Four Charges in Two Dimensions-Field and Potential
eT8-LMCT1: Three Point Charge System-Electric Potential      
eT10-LMCT1: Two Parallel Plates-Capacitance  

 

Conflicting Contention Tasks (CCT)     
eT1-CCT1: Breaking a Charged Insulating Block-Charge Density 
eT1-CCT2: Charged Insulators Connected with a Switch-Charge  
eT1-CCT3: Charged Sheet-Enclosed Charge      
eT3-CCT1: Electron in a Uniform Electric Field-Electric Force
eT3-CCT2: Two Charges-Force  
eT3-CCT3: Sphere and a Point Charge-Force    
eT3-CCT4: Curved Charged Rod and Two Point Charges-Force     
eT3-CCT5: Pairs of Charged Conductors-Force  
eT3-CCT6: Conducting Cube Between Point Charges-Force
eT4-CCT1: Cart Approaching Sphere-Distance   
eT6-CCT1: Electric Force on a Proton-Electric Field  
eT6-CCT2: Electric Potential vs Distance Graph II-Electric Field     
eT5-CCT3: Three Dimensional Locations in a Constant Electric Potential-Field 
eT5-CCT4: Three Charges in a Line-Electric Field     
eT5-CCT5: Airplane Flying Between Two Charged Clouds-Electric Field 
eT5-CCT6: Two Charged Spheres-Electric Field
eT5-CCT7: Potential near Charges-Electric Field     
eT5-CCT8: Point Charge in a Conducting Shell-Electric Field 
eT5-CCT9: Field Outside a Sphere with a Cavity-Electric Field       
eT6-CCT1: Systems of Point Charges-Work to Assemble 
eT8-CCT1: Two Charged Spheres-Electric Potential    
eT9-CCT1: Gaussian Cube Near a Charge-Flux  
eT9-CCT2: Charges Inside Gaussian Sphere-Electric Flux and Electric Field   
eT10-CCT1: Charged Rod Near a Suspended Bar Magnet-Rotation 
eT10-CCT2: Charged Rod and Electroscope-Deflection  


Changing Representation Tasks (CRT) 
eT5-CRT1: Electric Force on an Electron-Electric Field      
eT3-CRT1: Charges and Equipotentials-Force  
eT5-CRT2: Potential vs Position Graph II-Electric Field Direction   
eT5-CRT3: Potential vs Position Graph-Electric Field Graph  
eT8-CRT1: Parallel Plate Capacitor-Graph of Potential I     
eT10-CRT1: Parallel Plate Capacitor-Graph of Potential II   


Bar Chart Tasks (BCT)       
eT1-BCT1: Charged Insulating Blocks-Charge and Charge Density       
eT3-BCT1: Three Charges in a Line-Force     
eT5-BCT1: Potential vs Position Graph II-Electric Field     
eT5-BCT2: Point Charge-Electric Field       
eT5-BCT3: Charged Conducting Spherical Shells-Electric Field
eT7-BCT1: Potential Near Charges-Electric Field and Potential       
eT6-BCT1: Systems of Point Charges-Work to Assemble 


What, if anything, is Wrong Tasks (WWT)     
eT1-WWT1: Breaking a Charged Insulating Block-Charge Density
eT1-WWT2: Breaking a Charged Insulating Block-Charge Density
eT4-WWT1: Equipotential Lines-Direction of Proton's Motion  
eT1-WWT3: Insulator and a Grounded Conductor-Induced Charge 
eT1-WWT4: Balloon Sticking on a Wall-Charge Distribution    
eT1-WWT5: Neutral Metal Sphere With a Charged Rod-Charge Distribution       
eT5-WWT1: Electric Force on an Electron-Electric Field      
eT5-WWT2: Hollow Conductors-Field   
eT3-WWT1: Charges Arranged in a Triangle-Force      
eT3-WWT2: Two Charges-Force 
eT3-WWT3: Two Charged Objects-Force 
eT3-WWT4: Straight Charged Rod and Two Point Charges-Force  
eT3-WWT5: Sphere and a Point Charge-Force   
eT3-WWT6: Uniform Electric Field-Electric Force     
eT5-WWT2: Electron in a Uniform Electric Field-Velocity     
eT5-WWT3: Potential Near Charges-Electric Field     
eT5-WWT4: Three Charges In a Line-Electric Field    
eT5-WWT5: Potential vs Position Graph II-Electric Field     
eT5-WWT6: Field Outside a Sphere with a Cavity-Electric Field       
eT6-WWT1: Moving Charged Particle in an Electric Field-Potential Energy     
eT8-WWT1: Uniformly Charged Insulating Sphere-Electric Potential    
eT8-WWT2: Two Large Charged Parallel Sheets-Potential Difference    
eT9-WWT1: Uniform Electric Field-Flux       


Troubleshooting Tasks (TT)  
eT3-TT1: Charges Arranged in a Triangle-Force       

eT3-TT2: Two Charged Objects-Force  
eT3-TT3: Straight Charged Rod and Two Point Charges-Force   
eT3-TT4: Sphere and a Point Charge-Force    
eT4-TT1: Electron Moving into a Uniform Electric Field-Acceleration 
eT5-TT1: Potential vs Position Graph II-Electric Field      
eT5-TT2: Potential Near Charges-Electric Field      
eT5-TT3: Three Charges In a Line-Electric Field     

eT7-TT1: Two Connected Charged Spheres-Potential and Charge    
eT8-TT1: Two Large Charged Parallel Sheets-Potential Difference     
eT9-TT1: Conducting Shell-Flux      
eT10-TT1: Charged Rod Near a Suspended Bar Magnet-Rotation Direction


Predict and Explain Tasks (PET)     
eT1-PET1: Two Insulating Rods-Charge Density
eT1-PET2: Electroscope-Charge       
eT3-PET1: Two Charged Objects-Force 
eT3-PET2: Conducting Cube Between Point Charges-Force       
eT4-PET1: Straight Charged Rod and Two Point Charges-Accelerate     
eT4-PET2: Electric Potential vs Position Graph II-Motion of Charged Particles       
eT8-PET1: Parallel Plate Capacitor-Potential


Working Backwards Tasks (WBT)       
eT2-WBT1: Three Charges-Physical Situation  
eT2-WBT2: Charge Arrangement-Physical Situation     
eT2-WBT3: Electric Field Graphs-Physical Situation  
eT2-WBT4: Electric Field Graphs-Physical Situation  
eT2-WBT5: Electric Potential Difference-Physical Situation  
eT2-WBT6: Electric Potential x and y Graphs-Electric Field  
eT2-WBT7: Charged Rod with Electric Field Components-Length and Location    
eT2-WBT8: Potential near Charges-Physical Situation 
eT2-WBT9: Proton Moving Straight Through Magnetic Field-Cause       
eT2-WBT10: Forces on Three Charges Along a Line-Charge Location     
eT2-WBT11: Forces on Three Charges in Two Dimensions-Charge Locations       
eT2-WBT12: Point Charge Inside a Shell-Shell Properties     
eT2-WBT13: Charged Insulating Sheets-Electric Field 


MAGNETISM

Ranking Tasks (RT) 
mT2-RT1: Charge within a Uniform Magnetic Field-Magnetic Force      
mT2-RT2: Moving Charge Path-Direction and Strength of the Magnetic Field    
mT3-RT1: Moving Charge near a Straight Current-Carrying Wire-Acceleration   
mT4-RT1: Current-Carrying Wire in a Uniform Magnetic Field-Magnetic Force   
mT6-RT1: Straight Current-Carrying Wire-Magnetic Field      
mT6-RT2: Three Dimensional Locations near a Long Straight Wire-Magnetic Field       
mT7-RT1: Current-Carrying Circular Loops-Magnetic Field     
mT8-RT1: Current-Carrying Straight Wires-Magnetic Field     
mT8-RT2: Three Parallel Current-Carrying Wires I-Magnetic Field     
mT8-RT3: Three Parallel Current-Carrying Wires II-Magnetic Field at Wire Y  
mT9-RT1: Parallel Current-Carrying Wires I-Magnetic Force on Wire   
mT10-RT1: Moving Charge in a Uniform Magnetic Field-Change in Kinetic Energy
mT11-RT1: Moving Rectangular Loops in Uniform Magnetic Fields-Flux  
mT11-RT2: Moving Rectangular Loops in Uniform Magnetic Fields-Flux  
mT11-RT3: Moving Rectangular Loops in Uniform Magnetic Fields-Flux Change   
mT11-RT4: Moving Rectangular Loops in Uniform Magnetic Fields-Flux Change   
mT12-RT1: Moving Rectangular Loops in Uniform Magnetic Fields-Voltage       
mT13-RT1: Moving Rectangular Loops in Uniform Magnetic Fields-Current       
mT13-RT2: Changing Current-Bulb Brightness  
mT14-RT1: Wire on a Loop Moving in a Magnetic Field-Magnetic Field  
mT14-RT2: Loop Moving into a Uniform Magnetic Field-Magnetic Field  
mT14-RT3: Loops and Uniform Magnetic Fields-Magnetic Field  
mT14-RT4: Wire on a Loop Moving in a Magnetic Field-Induced Magnetic Field  
mT14-RT5: Loops and Uniform Magnetic Field-Induced Magnetic Field   
mT15-RT1: Wire Loops and Moving Magnets-Loop Motion 


Comparison Tasks (CT)       
mT11-CT1: Moving Rectangular Loops in Uniform Magnetic Fields-Flux  
mT11-CT2: Moving Rectangular Loops in Uniform Magnetic Fields-Flux Change   
mT13-CT1: Moving Rectangular Loops in Uniform Magnetic Fields-Current       
mT13-CT2: Moving Rectangular Loops in Uniform Magnetic Fields-Current       


Qualitative Reasoning Tasks (QRT)   
mT1-QRT1: Electric Charge Near a Bar Magnet-Force Direction 
mT1-QRT2: Charge Near a Circular Current Loop-Force Direction       
mT2-QRT1: Charged Particle and a Uniform Magnetic Field-Path
mT3-QRT1: Moving Charge near a Straight Current-Carrying Wire-Acceleration  
mT4-QRT1: Current-Carrying Wire in a Uniform Magnetic Field-Magnetic Force  
mT4-QRT2: Current-Carrying Wire in a Uniform Magnetic Field-"Bend" of Wire  
mT5-QRT1: Two Parallel Long Wires-Force Difference  

mT5-QRT2: Suspended Permanent Magnet and Circular Coil-Scale Reading   
mT6-QRT1: Straight Current-Carrying Wire-Magnetic Field     
mT8-QRT1: Three Parallel Current-Carrying Wires I-Magnetic Field    
mT8-QRT2: Three Parallel Current-Carrying Wires II-Magnetic Field at a Wire 
mT10-QRT1: Moving Charge in a Uniform Magnetic Field-Kinetic Energy Change  
mT11-QRT1: Moving Rectangular Loops in Uniform Magnetic Fields-Flux and Flux Change 
mT11-QRT2: Moving Rectangular Loops in Uniform Magnetic Fields-Flux and Flux Change 
mT13-QRT1: Changing Current-Bulb Brightness 
mT13-QRT2: Circular Loop outside a Long Solenoid-Induced Current    
mT14-QRT1: Loop Moving in a Uniform Magnetic Fields-Induced and Total Magnetic Field
mT14-QRT2: Loops and Magnetic Field-Direction of Induced Magnetic Field     
mT15-QRT1: Wire Loops and Moving Magnets-Motion of the System       


Linked Multiple Choice Tasks (LMCT) 
mT2-LMCT1: Moving Charge within a Uniform Magnetic Field-Force      
mT3-LMCT1: Moving Charge between Two Current-Carrying Wires-Acceleration    
mT3-LMCT2: Charge Moving Along Wire-Magnetic Force  
mT4-LMCT1: Current in a Uniform Magnetic Field-Magnetic Force       
mT6-LMCT1: Long Wire with a Current-Magnetic Field  
mT7-LMCT1: Current-Carrying Circular Loop-Magnetic Field    
mT8-LMCT1: Three Current-Carrying Wires-Magnetic Field between Wires
mT8-LMCT2: Three Parallel Current-Carrying Wires I-Magnetic Field   
mT9-LMCT1: Three Parallel Current-Carrying Wires I-Magnetic Force on Wire   
mT12-LMCT1: Moving Rectangular Loops in Uniform Magnetic Fields-Emf 
mT12-LMCT2: Rectangular Loop in a Uniform Magnetic Field-Velocity   
mT13-LMCT1: Moving Rectangular Loops in Uniform Magnetic Fields-Current     
mT13-LMCT2: Loops with Bulbs near a Current-Bulb Lighting   
mT15-LMCT1: Wire Loops and Moving Magnets-Loop Behavior     


Conflicting Contentions Tasks (CCT) 
mT1-CCT1: Electric Charge Near a Bar Magnet-Force Direction 
mT1-CCT2: Charge Near a Circular Current Loop-Force Direction       
mT3-CCT1: Charged Particle and Straight Current-Carrying Wire-Force 
mT5-CCT1: Moving Magnet and Circular Loop-Force     
mT5-CCT2: Two Magnets-Force 
mT8-CCT1: Three Parallel Current-Carrying Wires II-Force    
mT11-CCT1: Moving Rectangular Loops in Uniform Magnetic Fields-Flux Change  
mT12-CCT1: Moving Rectangular Loops in Uniform Magnetic Fields-Emf  
mT13-CCT1: Moving Rectangular Loops in Uniform Magnetic Fields-Current      
mT13-CCT2: Changing Current-Bulb Brightness 
mT14-CCT1: Moving Loops in Uniform Magnetic Fields-Magnetic Field   
mT14-CCT2: Loop Moving into a Uniform Magnetic Field-Induced Magnetic Field 


Changing Representations Tasks (CRT)
mT2-CRT1: Charge in a Uniform Magnetic Field Equation-Acceleration Graph    
mT3-CRT1: Long Current-Carrying Wire II-Magnetic Field      
mT4-CRT1: Force Equation-Diagram of the Current in a Magnetic Field 
mT6-CRT1: Magnetic Field Equation-Current and the Magnetic Field Diagram    
mT11-CRT1: Moving Rectangular Loops in Uniform Magnetic Fields-Flux 
mT11-CRT2: Moving Parallelogram Loop in Uniform Magnetic Fields-Flux
mT12-CRT1: Flux vs Time Graph-EMF vs Time Graph     
mT13-CRT1: Moving Rectangular Loops in Uniform Magnetic Fields-Current      
mT15-CRT1: Wire Loops and Moving Magnets-Current    


Bar Chart Tasks (BCT)       
mT5-BCT1: Two Long Straight Wires-Force     
mT5-BCT2: Long Straight Wire and Rectangular Coil-Force     
mT6-BCT1: Straight Current-Carrying Wire-Magnetic Field     
mT8-BCT1: Three Parallel Current-Carrying Wires I-Magnetic Field    
mT10-BCT1: Moving Charge in a Uniform Magnetic Field-Work & Kinetic Energy  
mT10-BCT2: Moving Charge in a Uniform Magnetic Field-Work & Kinetic Energy  


What, if anything, is Wrong Tasks (WWT)     
mT1-WWT1: Electric Charge Near a Bar Magnet-Force Direction 
mT2-WWT1: Moving Charge within a Uniform Magnetic Field-Force Direction     
mT2-WWT2: Charged Particles and a Uniform Magnetic Field-Direction of Motion
mT3-WWT1: Moving Charge near a Straight Current-Carrying Wire-Force 
mT4-WWT1: Current-Carrying Wire in a Uniform Magnetic Field-Force Direction 

mT6-WWT1: Current-Carrying Wire I-Magnetic Field Direction     
mT9-WWT1: Three Parallel Current-Carrying Wires I-Magnetic Force    
mT13-WWT1: Changing Current-Bulb Brightness 
mT14-WWT1: Moving Loop in Uniform Magnetic Field-Induced Magnetic Field     
mT14-WWT2: Loop Moving into a Uniform Magnetic Field-Induced Magnetic Field 


Troubleshooting Tasks (TT)  
mT2-TT1: Path of a Moving Electron in a Uniform Magnetic Field      
mT3-TT1: Moving Positive Charge near a Current-Carrying Wire-Force  
mT4-TT1: Current-Carrying Wire in a Uniform Magnetic Field-Force    
mT6-TT1: Current-Carrying Wire-Magnetic Field       
mT7-TT1: Current-Carrying Circular Loop-Magnetic Field      
mT11-TT1: Moving Rectangular Loops in Uniform Magnetic Fields-Flux Change   
mT12-TT1: Moving Rectangular Loops in Uniform Magnetic Fields-Voltage       
mT13-TT1: Changing Current-Bulb Brightness  
mT14-TT1: Moving Loops in Uniform Magnetic Fields-Magnetic Field    


Predict and Explain Tasks (PET)     
mT2-PET1: Electron Moving into a Uniform Magnetic Field-Electron    
mT2-PET2: Proton at Rest in a Uniform Magnetic Field-Proton 
mT2-PET3: Proton Moving into a Uniform Magnetic Field-Proton
mT3-PET1: Positive Charge at Rest Near a Current-Carrying Wire-Charge       
mT8-PET1: Three Parallel Current-Carrying Wires I-Change Single Current     
mT10-PET1: Moving Charge in a Uniform Magnetic Field-Kinetic Energy 
mT13-PET1: Circular Loops within a Solenoid-Ammeter 


Working Backwards Tasks (WBT)       
mT2-WBT1: Equation For a Charge and a Magnetic Field I-Physical Situation   
mT2-WBT2: Equation for a Charge and a Magnetic Field II-Physical Situation  
mT4-WBT1: Equation for a Current and a Magnetic Field II-Physical Situation 
mT7-WBT1: Equation for a Current and a Magnetic Field-Physical Situation    
mT8-WBT1: Equation for Three Currents-Physical Situation    
mT8-WBT2: Three Parallel Current-Carrying Wires I-Direction of Currents     
mT8-WBT3: Three Parallel Current-Carrying Wires II-Direction of Currents    
mT9-WBT1: Three Parallel Current-Carrying Wires I-Direction of Currents     
mT10-WBT1: Charge and a Magnetic Field-Physical Situation   
mT11-WBT1: Moving Rectangular Loops in Uniform Magnetic Fields-Situation    
mT11-WBT2: Flux versus Time graph-Loop Characteristics      
mT11-WBT3: Moving Rectangular Loops in Uniform Magnetic Fields-Situation    
mT12-WBT1: Moving Rectangular Loops in Uniform Magnetic Fields-Situation