Force on a Current Carrying Conductor

Diagram shows a coil placed between the poles of a permanent magnet and is connected to the external circuit.Determine the direction of rotation of the coil when the switch is closed.

• Clock wise

• Anti Clock wise

• Alternately, anticlockwise then clockwise

• Alternately, clockwise then anticlockwise

Diagram shows a coil placed between two opposite magnetic poles. An electric current flows through the coil producing a pair of turning force, F.Which diagram shows the correct catapult field ?

• 
• 
• 
• 

Diagram shows a current–carrying conductor placed between the poles of two magnet bars. Which diagram shows the resulting magnetic field ?

• 
• 
• 
• 

The motion of a current carrying conductor in an magnetic fields can be determined by

• Right hand Grip Rule

• Fleming’s Right Hand Rule

• Fleming’s Left Hand Rule

• Direction of current flow

Diagram shows a current – carrying conductor in magnetic field. What is the direction of the force that acts on the conductor ?

• A

• B

• C

• D

X and Y in diagram are the ends of a coil in which electric current flows. What is the direction of the force exerted on X and Y?

• X- upwards Y-upwards

• X- upwards Y-downwards

• X- downwards Y-upwards

• X- downwards Y-downwards

Diagram shows wire X and wire Y connected in a circuit. Which direction of the electromagnetic forces acting on wire X and wire Y is correct when the switch is closed?

• 
• 
• 
• 

The speed of direct current motor can be reduced by

• increasing the amount of current

• increasing the strength of magnet

• increasing number of turns of coil

• increasing the resistance of coil wire

What does the thumb indicate in Fleming's Left Hand Rule?

• Force

• Motion

• Current

• Magnetic field direction

Name one factor that does not affect the magnitude of a force in on a current-carrying conductor placed in a magnetic field?

• Gravity

• Magnetic flux density/size of magnetic field

• Size of the current

• Length of the conductor