ELECTRIC CIRCUITS QUIZ

A 230V, 50Hz voltage is applied to a coil having L = 5H and R = 2 Ohm in series with capacitance C. When the voltage across the coil is 400V, find the current in the circuit?

0.1578 A.

0.1465 A.

0.2547 A.

0.4583 A.

TRUE ANSWER : ?
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The rms value of sine wave is 100 A. Its peak value is

70.7 A.

150 A.

282.8 A.

141.4 A.

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Which of the following is applicable for both linear and non-linear circuits?

None of these .

Norton’s theorem.

Superposition theorem.

Thevnin’s theorem.

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You have to replace 1500 Ω resistor in radio. You have no 1500 Ω resistor but have several 1000 Ω ones which you would connect

two in parallel and one in series.

two in parallel.

three in parallel.

three in series.

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Which of the following are the passive elements?

Both

None of these.

Resistor

Bulb

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Average power taken by the pure capacitor is

Minimum

Zero

Maximum

Any of the above

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Air gap flux density is of the order of

0.85 - 0.9 T.

0.65 - 0.9 T.

0.75 - 0.8 T.

0.35 - 0.5 T.

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To obtain wide bandwidth, network is designed with which of the following?

High Q factor

Low Q factor

Unity Q factor

Zero Q factor

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Condition for a balanced 3 - phase load is that, each phase has the same value of __________________.

all of these.

power factor.

impedance.

resistance.

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A 60 Hz frequency voltage would cause a bulb to turn on and off

80 times per second.

60 times per second.

70 times per second.

120 times per second.

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