SSC JE Electrical 2019 with solution SET-1
 Which of the following is the correct relation regarding coupled coils?

M = (L1 − L2)/2
M ≤ (L1L2)0.5
M > (L1L2)0.5
M = (L1 + L2)/2

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SSC JE Electrical 2019 with solution SET-1
 In an AC network, the load connected is (10 + j10). The phase relation between the voltage applied and the current through the load is:

Voltage lags current by 30°
Voltage lags current by 45°
Voltage and current are in phase with each other
Voltage leads current by 45°

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SSC JE Electrical 2019 with solution SET-1
 A shaded pole motor is basically a motor

Synchronous
Single-phase induction
Shunt
Series

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SSC JE Electrical 2019 with solution SET-1
 Z1 and Z2 are connected in series to form a load. A wattmeter’s current coil is connected in series with the load, whereas its pressure coil is connected across Z2. The wattmeter reads

Zero always
Power consumed by Z1 and Z2
Power consumed by Z2
Power consumed by Z1

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