Question

a) A current loop in a uniform magnetic field experiences

A net force and net torque

A net force

A net torque

b) A current loop in an external magnetic field will rotate so that its own magnetic field is

perpendicular to the external field

parallel to the external field

anti-parallel to the external field

c) Is the simple motor motion similar to the simple pendulum motion?

the loop rotates back and forth about an equilibrium point.

No

Yes

d) To construct a motor its very important to take into account

spinning of coil

of friction only

of decreasing friction and a well balanced coil.

e) If the current and magnetic field are kept constants then torque can be increased by

only increasing number of turns but not the area

only increasing area but not the turns in the loop

increasing either area or number of turns in the loop

Answer 1

Answers:

a) A current loop in a uniform magnetic field experiences

Answer: A net torque

b) A current loop in an external magnetic field will rotate so that its own magnetic field is

Answer: perpendicular to the external field

c) Is the simple motor motion similar to the simple pendulum motion?

Answer: No

d) To construct a motor its very important to take into account

Answer: of decreasing friction and a well balanced coil.

e) If the current and magnetic field are kept constants then torque can be increased by

Answer: of decreasing friction and a well balanced coil.