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Standard X
Physics
Question

The basic principle of working of motors is
  1. Electromagnetic Induction
  2. Force on current carrying conductor.
  3. Electrostatic Force
  4. Heating effect of electric current

A
Electromagnetic Induction
B
Force on current carrying conductor.
C
Electrostatic Force
D
Heating effect of electric current
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Solution
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When current is passed through the armature of an electric motor placed in an external magnetic field, it experiences forces along the arms and hence experiences a net torque. The torque causes a constant rotation of the armature.
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