which is the instrument that works on motor principle
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An electric motor utilises the magnetic effect of current. It works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it, a force acts on the coil which rotates it continuously.
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a moving iron is an instrument that works on motor principle. it is used to measure flow of current in a circuit. when electricity flows , the iron near the circuit attracts it as the circuit gains magnetic properties because of flow of current. more the force of attraction ,, more the amount of electric flow
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