ELECTRIC CIRCUITS QUIZ

The electrical resistance of human body is around

1000 ohms.

250 ohms.

25 ohms.

5 ohms.

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Disadvantages of constant k type filter

both A and B.

characteristic impedance unchanged in pass band.

attenuation does not increase rapidly beyond cut off frequency.

none of these.

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A 35 V source is connected to a series circuit of 600 Ω and R as shown. If a voltmeter of internal resistance 1.2 kΩ is connected across 600 Ω resistor, it reads 5 V. The value of R is

1.2 k Ω.

3.6 k Ω.

2.4 k Ω.

7.2 k Ω.

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A voltage of v = 100 sin (wt + π/3) is applied to pure resistor of 30 Ohm. What is the RMS value of current is

1.92.

5.77.

2.36.

4.71.

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Which of the following may be the value of resistivity of copper at absolute zero in ohm-metre?

6.24.

3.12.

0.020.

1.56.

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To apply reciprocity theorem response to excitation ratio is

Ohm.

Mho.

Either Ohm or Mho.

No units.

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A capacitor of 50 microfarad is connected in series with a resistance of 120 Ω. If above circuit is connected across 240 V, 50 Hz 1 - φ supply. Find the capacitive reactance?

135.86 Ω.

0.015 Ω.

1.765 Ω.

63.7 Ω.

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When a lossy capacitor with a dielectric of permittivity ε and conductivity σ operates at a frequency ω the loss tangent for the capacitor is given by

ω σ/ε.

ω ε/σ.

σ ω ε.

σ/ω ε.

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In a lead acid cell PbSO4 formed during

charging only.

both during charging as well as discharging.

neither during charging nor discharging.

discharging only.

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A star connected load has three equal impedance each of (40 + j30) Ω If the line current is 5 A then value of line voltage is

200 V.

250 √3 V.

250 V.

250 / √3 V.

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