Practice Test: Question Set - 01
1. The power consumed in a circuit element will be least when the phase difference between the current and voltage is
- (A) 180°
- (B) 90°
- (C) 60°
- (D) 0°
2. Form Factor is the ratio of
- (A) Average value/r.m.s. value
- (B) Average value/peak value
- (C) r.m.s. value/average value
- (D) r.m.s. value/peak value
3. Capacitive reactance is more when
- (A) Capacitance is less and frequency of supply
is less
- (B) Capacitance is less and frequency of supply is more
- (C) Capacitance is more and frequency of supply is less
- (D) Capacitance is more and frequency of supply is more
4. Pure inductive circuit
- (A) Consumes some power on average
- (B) Does not take power at all from a line
- (C) Takes power from the line during some part of the
cycle and then returns back to it during other part of the cycle
- (D) None of the above
5. Power factor of the following circuit will be zero
- (A) Resistance
- (B) Inductance
- (C) Capacitance
- (D) Both (B) and (C)
6. The double energy transient occur in the
- (A) Purely inductive circuit
- (B) R-L circuit
- (C) R-C circuit
- (D) R-L-C circuit
7. In any A.C. circuit always
- (A) Apparent power is more than actual power
- (B) Reactive power is more than apparent power
- (C) Actual power is more than reactive power
- (D) Reactive power is more than actual power
8. Magnitude of current at resonance in R-L-C circuit
- (A) Depends upon the magnitude of R
- (B) Depends upon the magnitude of L
- (C) Depends upon the magnitude of C
- (D) Depends upon the magnitude of R, Land C
9. The safest value of current the human body can carry for more than 3 second is
- (A) 4 mA
- (B) 9 mA
- (C) 15 mA
- (D) 25 mA
10. The purpose of a parallel circuit resonance is to magnify
- (A) Current
- (B) Voltage
- (C) Power
- (D) Frequency
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