8.2 Force on a current carrying conductor in magnetic field

b) based on the diagram above, choose the direction of the forces that act on the sides AB and CD of the coil.

• AB:UPWARD;CD:DOWNWARD

• AB:DOWNWARD;CD:UPWARD

c) What is the rule that is used to determine the direction of the force that acts on the coil?

What does the thumb indicate in flemings left hand rule?

• Force

• current

• Magnetic field direction

What direction is the force/motion in the following diagram?

• Perpendicular to the magnets

• Downwards

• Parallel and through the magnets

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A represented by

• direction of magnitude current

• direction of force

• direction of magnetic field

• direction of rotation

Diagram shows a dc motor. What is the functions of brush carbon?

• Push the brush so it will always contact with the commutator.

• To contact with the commutator so the current from the battery enters the coil.

• Reverse the direction of current in the coil every half rotation so that the coil continues to turn in same direction

Application of the force on current carrying conductor in a magnetic field

• Moving coil ammeter

• dynamo

• Dc motor

• electrIc bell

• Dc generator

How can you test to see if there is a current running through a wire?

• listen carefully to see if you hear a buzzing sound

• place several compasses around the wire

• place several batteries around the wire

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 ?

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