EE MCQ

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

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**

Related Question

SSC JE Electrical 2019 with solution SET-2
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If a zero-centered voltmeter has a scale from 5V to − 5V, then the span of it is

Voltage Scale Span of instrument = Vmax − Vmin

Given

Vmax = 5 V

Vmin = −5V

Span = 5 −(−5) = 10 V

SSC JE Electrical 2019 with solution SET-2
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While estimating the overhead lines, if the number of poles required is 14, then what is the estimated number of earth sets required?

While estimating the overhead lines, the first and last pole is always earth connected and after every 3rd electrical pole, the fourth pole is earthed. Therefore, the approximate number of required ground set = 4

SSC JE Electrical 2019 with solution SET-2
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A diode appears as in forward region of its characteristics?

A P-N junction acts as a voltage-controlled switch. During forward biasied the p-n junction diode acts like an ON switch. When reverse biased, it acts like an OFF switch.

SSC JE Electrical 2019 with solution SET-2
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Creeping is a term related to instruments?

**Creeping Error**

The slow but continuous rotation of the energy meter (Induction type) when only the pressure coil is excited and no current is flowing through the current coil is called creeping. This error may be due to excessive friction compensation, excessive voltage supply, stray magnetic field, etc.

In order to prevent creeping at no-load, two holes of the same radius are drilled in the disc on the opposite side of the spindle.