SSC JE Electrical 2019 with solution SET-1
 Let T be the net torque developed by the rotor runs at ω rad/s. What is the mechanical power developed?

Pmech = (2πωT)/60
Pmech = ωT
Pmech = (2πωT)
Pmech = (ωT)/60

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SSC JE Electrical 2019 with solution SET-1
 Lamp efficiency is measured in

Candela/watt
Lumen/lux
Lux/watt
Lumen/watt

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

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

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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

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

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