SSC JE Electrical Engineering 4th March 2017 Shift-2

Instructions

For the following questions answer them individually

SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 11


For the AC circuit as shown below,if the rms voltage across the resistor is 120 V, what is the value of the inductor?

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 12


The R-L circuit of the figure is fed from a constant magnitude variable frequency sinusoidal voltage source v_in. At 100 Hz, the R and L element each has a voltage drop $$U_{rms}$$. If the frequency of the source is changed to 50 Hz, then new voltage drop across R is:-

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 13


A certain R-L series combination is connected across a 50 Hz single-phase ac supply. If the instantaneous power drawn was found to be negative for 2 milliseconds in one cycle, the power factor angle of the circuit must be _____.

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 14


The voltage phaser of a circuit is $$10\angle15^\circ V$$ and the current phasor is $$2 \angle -45^\circ A$$. The active and reactive powers in the circuit are _____.

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 15


In an RLC circuit, supplied from an ac source, the reactive power is 1) average energy stored in the electric field

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 16


In gases the flow of current is due to _____.

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 17


Ohm's law is applicable to _____.

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 18


Pure metals generally have _____.

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 19


The insulation resistance of a cable of length 10 km is $$1 MΩ$$. For a length of 100 km of same cable, the insulation resistance will be _____.

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SSC JE Electrical Engineering 4th March 2017 Shift-2 - Question 20


All the resistances in figure shown below are $$1Ω$$ each. The value of current ‘I’ is:-

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