SSC JE Electrical 2019 with solution SET-1

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

Candela/watt

Lumen/lux

Lumen/watt

Lux/watt

Candela/watt

Lumen/lux

Lumen/watt

Lux/watt

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SSC JE Electrical 2019 with solution SET-1
What would the total loss of the 2kVA transformer corresponding to maximum efficiency be, provided the transformer has the iron of 150 W and full-load copper loss of 250W?

300 W

400 W

500 W

100 W

300 W

400 W

500 W

100 W

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SSC JE Electrical 2019 with solution SET-1
Identify the important feature of a DC series motor

High starting torque

Medium starting torque

Low starting torque

Zero starting torque

High starting torque

Medium starting torque

Low starting torque

Zero starting torque

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

Single-phase induction

Synchronous

Series

Shunt

Single-phase induction

Synchronous

Series

Shunt

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SSC JE Electrical 2019 with solution SET-1
Find the mutual inductance between two ideally coupled coils of 2H and 8H

2 H

4 H

16 H

8 H

2 H

4 H

16 H

8 H

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SSC JE Electrical 2019 with solution SET-1
A synchronous motor runs at 600rpm, which of the following case is true?

P = 10, f = 60 Hz

P= 12, f = 50 Hz

P = 8, f = 50 Hz

P = 12, f = 60 Hz

P = 10, f = 60 Hz

P= 12, f = 50 Hz

P = 8, f = 50 Hz

P = 12, f = 60 Hz

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