1) A force will act on a conductor placed in a magnetic field when :

a current is flowing in the conductor

the conductor is rotating

the conductor is placed in the magnetic field and it is not carrying a current

it is placed at right angle to the field

Answer is:

a current is flowing in the conductor

Explanation:

current

applied e.m.f.

torque

terminal voltage

Answer is:

current

supply voltage

intersection of the magnetic flux by the armature conductors

interaction of the two magnetic fields

Answer is:

less than

more than

equal to

zero

Answer is:

proportional to armature current

equal to armature current

inversely proportional to armature current

constant

Answer is: