SSC JE Electrical 2019 with solution SET-1
 What is the reason behind using a centrifugal switch in a single-phase induction motor?

To cut-off the starting winding at an appropriate instant
To protect the motor from overloading
To improve the starting performance of the motor
To out in the capacitor during running conditions

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SSC JE Electrical 2019 with solution SET-1
 Three lamps are connected in series across a 120V supply and take a current of 1.5A. If the resistance of two of the lamps is 30Ω, what is the resistance of the third lamp?

20Ω
40Ω
30Ω
10Ω

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SSC JE Electrical 2019 with solution SET-1
 The average value of a sinusoidal wave is:

2 × maximum value
0.637 × maximum value
√2 × maximum value
0.5 × maximum value

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