What is the back emf induced in the windings at normal speed

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Reference no: EM13279291

Part 1 A dc motor is connected to a constant emf of 15.6 V. The resistance of its windings is 2.0 ohms. At normal operating speed, the motor delivers 6.8 W of mechanical power.

(a) What is the initial current drawn by the motor when it is first started up?

(b) What current does it draw at normal operating speed?

Part 2 A transformer with 1817 turns on the primary and 386 turns on the secondary is used in an electric slot car racing set to reduce the input voltage amplitude of 170 V from the wall output. The current in the secondary coil is of amplitude 3.2 A.

What is the voltage amplitude across the secondary coil?

What is the current amplitude in the primary coil?

Reference no: EM13279291

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