ELECTRIC CIRCUITS QUIZ

In a lead acid cell PbSO4 formed during

discharging only.

charging only.

both during charging as well as discharging.

neither during charging nor discharging.

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An alternating voltage = 140 sinθ is supplied to a device which offers a resistance of 20 Ω in forward direction of current in reverse direction. Calculate the form factor.

1.11.

1.414.

0.318.

0.57.

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What are the points to be mentioned in specifying main switches?

Voltage grade.

Both A and B.

None of these.

Current rating.

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Atoms with fewer than 4 valence electrons are

insulator.

semi-conductor.

conductor.

none of these.

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Two battery having unequal emf

both a and d

cannot be connected in parallel.

can be connected in series only.

cannot be connected in series.

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The electron is lighter than a proton by a factor of about

184.

18.4.

1840.

18400.

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How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?

60

1200

10

600

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VRN, VYN and VBN are three phase voltage of a balanced three phase system. If VRN = 200∠30o V and VBN = 200∠- 90o V, then phase sequence of the system is

YRB.

RBY.

RYB.

BRY.

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A constant current source supplies a electric current of 300 mA to a load of 1 KΩ. When the load changed to 100 Ω, the load current will be

30 mA.

100 mA.

3 A.

300 mA.

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Condition for reciprocity in case of ABCD parameters is

AD-BC = 1 .

AB-CD = 1.

AB-CD = 0.

AD-BC = 0.

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