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SSC JE Electrical 2019 with solution SET-2

SSC JE Electrical 2019 with solution SET-2
If ‘V’ is the voltage phasor and ‘I’ is the current phasor, then VI represents

Active power
Reactive power
Apparent power
Total power

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Apparent Power (S): It is defined as the product of r.m.s value of voltage (V) and current (1). It is denoted by S.
S = V/I Volt Ampere

SSC JE Electrical 2019 with solution SET-2
The total number of possible phase sequences for a three-phase AC system is ____

3
2
0
1

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

A phase sequence is an order or sequence in which the currents or voltages of different phases attain their maximum values. In a three-phase system, there are only two possible phase sequences: R-Y-B (positive Phase Sequence) and R-B-Y (Negative Phase Sequence).

SSC JE Electrical 2019 with solution SET-2
Observe the given figure. Find Thevenin’s resistance as seen from open-circuited terminals?

16 Ω
4 Ω
32 Ω
8 Ω

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

To find the Thevenin’s resistance the current source is open-circuited and the voltage source is short-circuited.


SSC JE Electrical 2019 with solution SET-2
The urban service speed-time curve has no

Coasting period
Braking period
Free-running period
Acceleration period

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SSC JE Electrical 2019 with solution SET-2
An ideal voltage source is one that____?

Has infinite internal resistance
Supplies constant power
Has zero internal resistance
Has medium internal resistance

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SSC JE Electrical 2019 with solution SET-2
Under no-load conditions in transmission lines, the receiving end voltage is greater than the sending end voltage. This effect is called

Proximity effect
Ferranti effect
Corona effect
Skin effect

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