ELECTRIC CIRCUITS QUIZ

A balanced delta connected load has an impedance of 9∠30o Ω per phase. What is the impedance per phase of its equivalent star?

3∠30o Ω.

30∠30o Ω.

27∠30o Ω

None of these

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Our household apparatus are connected in

parallel.

cascade.

series.

series and parallel combination.

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A 3 wire, 3 - φ supply feeds a load consisting of three equal resistors. By how much is the load reduced if one of the resistors be removed when the load is in star?

66.66 % of the original load.

50 % of the original load.

33.33 % of the original load.

25 % of the original load.

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The absolute charge of an electron is

- 1.6 × 10-19 C.

none of above.

1.6 × 10-19 C.

+ 1.6 × 10-19 C.

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Which field is associated with the capacitor?

Magnetic.

Both of (A) and (B).

None of above.

Electric.

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Aluminium is produced from bauxite by

rotating.

oxidation.

electrolytic process.

froth flotation.

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Internal heating of a capacitor is usually attributed to

electron movement.

plate vibration.

dielectric charge.

leakage resistance.

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Super position theorem is not applicable for

None of these

current calculations.

voltage calculations.

power calculations.

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The Norton equivalent of a network is given as IN = 4A and RN = 2 Ohm. When this circuit is connected across a 2 Ohm load, the current through the load is

1 A.

4 A.

2 A.

0 A.

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If the peak value of a sine wave is 100 V, then its RMS value will be

63.6 V.

70.7 V.

100 V.

88 V.

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