ELECTRIC CIRCUITS QUIZ

A 10 Ohm resistor has power rating of 1W. Find the maximum current rating.

0.316 A.

1 A.

0.1 A.

0.01 A.

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A 10 μF capacitor and 100 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow brightest?

100 Hz.

10 Hz.

1 Hz.

1000 Hz.

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The coils having self inductor of 10 mH and 15 mH have an effective inductor of 40 mH, when connected in series aiding. What will be the equivalent inductor if we connect them in series opposing

10 mH.

5 mH.

20 mH.

0 mH.

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i) In star connection line current is equal to phase current. ii) In delta connection line voltage is equal to phase voltage. For a given phase connected to the particular line which of the statement is true ?

Only (2).

None of these.

Both (1) and (2).

Only (1).

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Transients are presents in the circuit when the circuit is having

C.

L.

R.

Either L or C.

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If the measured value of a capacitor is 205.3µF and true value is 201.4µF the percentage relative error is

1.94%

39.00%

1.89%

25.64%

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Select the wave that has the least value of form factor.

Sine wave.

Square wave.

Rectangular wave.

Triangular wave.

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Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be

10 µF

1 µF

25 µF

5 µF

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In what connection we get neutral?

Delta.

Mesh.

Star.

Both A and B.

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In delta connected circuit when one resistor is open, then power will be

0.

remain unchanged.

increased by factor of 3.

reduced by the factor of 3.

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