ELECTRIC CIRCUITS QUIZ

A constant voltage source has

high internal resistance.

minimum current capacity.

minimum efficiency.

low internal resistance.

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When power factor angle is varying, the shape of the current locus is

Triangle

Circle

Semicircle

Straight line

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The equation for 25 cycles current sine wave having rms value of 30 amps, will be

30sin50πt.

42.4sin50πt.

30sin25πt.

42.4sin25πt.

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Which of the following materials has highest electrical conductivity ?

Aluminium.

Steel.

Copper.

Silver.

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The value of E within the field due to a point charge can be found with help of

Faradays law.

Coulombs law.

Kirchhoffs law.

Lenzs law.

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What is time period T?

Time taken by an alternating quantity to reach the peak value.

Time taken by an alternating quantity to complete one full cycle.

Time taken by an alternating quantity to complete the (+)ve half.

Time taken by an alternating quantity to complete the (-)ve half.

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What is Va in the below circuit?

(3R + 10) / 3.

(4R + 10) / 3.

(6R - 10) / 3.

(6R + 10) / 3.

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Laplace transform analysis gives

time domain response only.

frequency domain response only.

both (a) and (b).

real response only.

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There are two capacitors C1 and C2 in parallel , what will be their equivalent capacitance?

(C1C2) / C1 + C2.

C1C2.

(C1 + C2) / C1C2.

C1 + C2.

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Efficiency of electrical machines should be calculated by measuring

losses.

output and input.

losses and output.

losses and input.

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