A. falls to 36.8% of its final steady value
B. rises to 38.6% of its final steady value
C. rises to 63.2% of its final steady value
D. none of the above
Related Mcqs:
- If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be________?
A. 0.001 s
B. 0.1 s
C. 10 s
D. 100 s - In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value__________?
A. will change the maximum value of current at resonance
B. will change the resonance frequency
C. will change the impedance at resonance frequency
D. will increase the selectivity of the circuit - In a series resonant circuit, the impedance of the circuit is___________?
A. minimum
B. maximum
C. zero
D. none of the above - All the rules and laws of D.C. circuit also apply to A.C. circuit containing_____________?
A. capacitance only
B. inductance only
C. resistance only
D. all above - The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is_________?
A. 4 kVAR
B. 6 kVAR
C. 8 kVAR
D. 16 kVAR - The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is__________?
A. 12 kW
B. 22 kW
C. 32 kW
D. 64 kW - Which of the following circuit component opposes the change in the circuit voltage ?
A. Inductance
B. Capacitance
C. Conductance
D. Resistance - Time constant of a circuit is the time in seconds taken after the application of voltage to each___________?
A. 25% of maximum value
B. 50% of maximum value
C. 63% of maximum value
D. 90% of the maximum value - The time constant of a series R-C circuit is given by____________?
A. R/C
B. RC2
C. RC
D. R2C - Power factor of the following circuit will be unity
A. inductance
B. capacitance
C. resistance
D. both A. and B.
