Force on Current Carrying Conductor

Magnetic field produced around a straight conductor due to current in it is given by

• Fleming's right hand rule

• Right hand grip rule

• Clock rule

• Fleming's left hand rule

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?

The figure shows the structure of a motor. Which of the following will not affect the speed of rotation of the motor?

• The current in the coil

• Strength of the magnetic field

• The number of turns of wire in the coil

• The direction of the current in the coil

Figure 1 and Figure 2 show the structures of a d.c motor and a d.c. motor respectively. State the change of energy that occurs in a motor.

• Electrical energy to kinetic energy

• Kinetic energy to electrical energy

What does the thumb indicate in flemings left hand rule?

• Force

• Motion

• Current

• Magnetic field direction

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Name one factor that does not affect the size 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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Why might a current-carrying wire be placed between a magnetic field?

• To increase the current from the interaction of magnetic fields

• To increase the voltage from the interaction of magnetic fields

• To produce a force from the interaction of magnetic fields

Tags

NGSS.HS-PS2-5

c represented by

• direction of magnetic field

• direction of rotation

• direction of force

• direction of magnitude current

What is the functions of commutator?

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

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

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