ELECTRIC CIRCUITS QUIZ

In RLC series circuit, if the voltage across capacitor is greater than voltage across inductor, then power factor of the network is

leading.

lagging.

unity.

zero.

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Three resistors each R Ohm is connected to form a triangle. The equivalent resistance across any terminals is

R/2.

2R/3.

R.

3R/2.

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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.

1.414.

1.11.

0.318.

0.57.

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Three resistances of two ohms each are connected in star. In the equivalent delta representation each resistance will have a value of _______________ Ω.

3.4.

5.2.

6.

0.6.

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The mass of a neutron of atom is

1.602 × 10 - 19 Kg.

1.672 × 10 - 26 Kg.

1.609 × 10 - 31 Kg.

1.675 × 10 - 27 Kg.

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In above question, determine the current if E = 100 V, R = 20Ω, R1 = 10 Ω and L = 2 H at 0.5 sec after short circuit.

6.98.

9.59.

- 6.28.

- 9.59.

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Under resonance condition the phase angle between voltage phase and current phase is

90°

- 90°

45°

0°

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In what connection we get neutral?

Mesh.

Delta.

Both A and B.

Star.

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Fall time is the time required for a pulse to decrease from 90 to ________% if its maximum values

15

10

20

5

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Two resistances R1 and R2 give combined resistances 4.5 Ω and 1 Ω when they are connected in series and parallel respectively. What would be the values of these resistances?

6 Ω and 9 Ω.

3 Ω and 6 Ω.

1.5 Ω and 3 Ω.

3 Ω and 9 Ω.

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