SSC JE Electrical 2019 with solution SET-1
 Split-phase, capacitor, and shaded-pole single-phase motors classified as:

Repulsion motors
Un-excited synchronous motors
1-phase induction motors
A.C. series motors

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SSC JE Electrical 2019 with solution SET-1
 Which of the following lamps has the shortest/less life span in working hours?

Fluorescent lamp
Sodium vapor lamp
Mercury vapor lamp
Incandescent lamp

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

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

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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?

30Ω
10Ω
40Ω
20Ω

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

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

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