SSC JE Electrical 2019 with solution SET-1

SSC JE Electrical 2019 with solution SET-1
Identify the machine shown in the circuit

DC long shunt compound generator

DC shunt motor

DC short shunt compound generator

DC short shunt compound motor

DC long shunt compound generator

DC shunt motor

DC short shunt compound generator

DC short shunt compound motor

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

Lumen/lux

Lux/watt

Candela/watt

Lumen/watt

Lumen/lux

Lux/watt

Candela/watt

Lumen/watt

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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?

10Ω

40Ω

30Ω

20Ω

10Ω

40Ω

30Ω

20Ω

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

M ≤ (L1L2)0.5

M = (L1 − L2)/2

M > (L1L2)0.5

M = (L1 + L2)/2

M ≤ (L1L2)0.5

M = (L1 − L2)/2

M > (L1L2)0.5

M = (L1 + L2)/2

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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)

Pmech = ωT

Pmech = (2πωT)/60

Pmech = (ωT)/60

Pmech = (2πωT)

Pmech = ωT

Pmech = (2πωT)/60

Pmech = (ωT)/60

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SSC JE Electrical 2019 with solution SET-1
The below symbol which is used in single line diagrams represents

Current transformer

Potential transformer

Circuit breaker

Power transformer

Current transformer

Potential transformer

Circuit breaker

Power transformer

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