A device 'X' is connected to an ac source V = . The variation of voltage, current and power in one cycle is shown in the following graph.
(a) Identify the device 'X'.
(b) Which of the curves A, B and C represent the voltage, current and the power consumed in the circuit?
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To keep the torque on DC motor from reversing every time the coil moves through the plane perpendicular to the magnetic field a split ring device called a commutator is used to reverse the current at that point the purpose of the split ring commutator in a DC Motor is A)to prevent the battery or power sup
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