Govt Exams Mock Test FREE | Online Quiz Competition

Q1. In a series RLC circuit, the supply voltage is 230 V at 50 Hz. The resonant current is 2 A at the resonant frequency of 50 Hz. Under the resonant condition, the voltage across the capacitor is measured to be equal to 460 V. What are the values of L and C?

0.73 H and 13.85 \(\mu\)F

0.73 mH and 13.85 \(\mu\)F

0.53 mH and 15.83\(\mu\) F

0.53 H and 15.83 \(\mu\)F

Q2. Three resistances \(750\:\Omega\), \(600\:\Omega\) and \(200\:\Omega\) are connected in parallel. The total current is 1 A. Determine the voltage applied.

200 V

100 V

150 V

125 V

Q3. The voltage across A-B in the circuit shown in Fig. is

10 V

4 V

8 V

2 V

Q4. An a.c. series circuit has \(R=6\:\Omega,\:X_L=20\:\Omega\:and\:X_C=12\:\Omega.\) The circuit power factor will be

0.8 lagging

0.5 leading

0.6 lagging

0.6 leading

Q5. In the measurement of power by two wattmeter method in three phase circuit, when one of the wattmeter shows zero reading, it can be concluded that

One phase is earthed

Power factor is unity

Power factor is leading

Power factor is 0.5 lagging

Q6. Three identical resistances, each of 15 \(\Omega\), are connected in delta across 400 V, 3-phase supply. What value of resistance in each leg of balanced star-connected load would take the same line current across the same supply ?

15 \(\Omega\)

45 \(\Omega\)

5 \(\Omega\)

30 \(\Omega\)

Q7. In a circuit, voltage and current are given by \(V=10(\sin \omega t+30^\circ\)) and \(I=10 (\sin \omega t-30^\circ\)). Calculate the power consumed in this circuit:

100 W

50 W

15 W

25 W

Q8. A resistor of \(8\:\Omega\) and a capacitor of \(178\:\mu F\) are connected in series to a 250V, 50 Hz supply. Net impedance of the circuit is given by \(19.6\:\Omega\) . What is the value of reactive power?

2968.1 VAR

2511 VAR

2921 VAR

3196.4 VAR

Q9. Two coils, each one having self inductance of 10 H. are coupled such that the mutual inductance between them is 4 H. Find the coefficient of the coupling between the coils.

0.08

0.4

0.8

0.04

Q10. An iron cored coil has resistance R and inductance L. It is connected across a capacitor C. At resonance this circuit behaves like

an open circuit

a short circuit

a pure resistor of value R

a pure resistor of value much higher than R

Quiz

Year 2025

March
Week # 1 Quiz 1

Q1. In a series RLC circuit, the supply voltage is 230 V at 50 Hz. The resonant current is 2 A at the resonant frequency of 50 Hz. Under the resonant condition, the voltage across the capacitor is measured to be equal to 460 V. What are the values of L and C?

Q2. Three resistances \(750\:\Omega\), \(600\:\Omega\) and \(200\:\Omega\) are connected in parallel. The total current is 1 A. Determine the voltage applied.

Q3. The voltage across A-B in the circuit shown in Fig. is

Q4. An a.c. series circuit has \(R=6\:\Omega,\:X_L=20\:\Omega\:and\:X_C=12\:\Omega.\) The circuit power factor will be

Q5. In the measurement of power by two wattmeter method in three phase circuit, when one of the wattmeter shows zero reading, it can be concluded that

Q6. Three identical resistances, each of 15 \(\Omega\), are connected in delta across 400 V, 3-phase supply. What value of resistance in each leg of balanced star-connected load would take the same line current across the same supply ?

Q7. In a circuit, voltage and current are given by \(V=10(\sin \omega t+30^\circ\)) and \(I=10 (\sin \omega t-30^\circ\)). Calculate the power consumed in this circuit:

Q8. A resistor of \(8\:\Omega\) and a capacitor of \(178\:\mu F\) are connected in series to a 250V, 50 Hz supply. Net impedance of the circuit is given by \(19.6\:\Omega\) . What is the value of reactive power?

Q9. Two coils, each one having self inductance of 10 H. are coupled such that the mutual inductance between them is 4 H. Find the coefficient of the coupling between the coils.

Q10. An iron cored coil has resistance R and inductance L. It is connected across a capacitor C. At resonance this circuit behaves like

Quiz

Year 2025

February Week # 3 Expire on 14 Mar 2025

February Week # 4 Expire on 21 Mar 2025

March Week # 1 Expire on 31 Mar 2025

March Week # 2 Expire on 07 Apr 2025

March Week # 1 Quiz 1

Q1. In a series RLC circuit, the supply voltage is 230 V at 50 Hz. The resonant current is 2 A at the resonant frequency of 50 Hz. Under the resonant condition, the voltage across the capacitor is measured to be equal to 460 V. What are the values of L and C?

Q2. Three resistances \(750\:\Omega\), \(600\:\Omega\) and \(200\:\Omega\) are connected in parallel. The total current is 1 A. Determine the voltage applied.

Q3. The voltage across A-B in the circuit shown in Fig. is

Q4. An a.c. series circuit has \(R=6\:\Omega,\:X_L=20\:\Omega\:and\:X_C=12\:\Omega.\) The circuit power factor will be

Q5. In the measurement of power by two wattmeter method in three phase circuit, when one of the wattmeter shows zero reading, it can be concluded that

Q6. Three identical resistances, each of 15 \(\Omega\), are connected in delta across 400 V, 3-phase supply. What value of resistance in each leg of balanced star-connected load would take the same line current across the same supply ?

Q7. In a circuit, voltage and current are given by \(V=10(\sin \omega t+30^\circ\)) and \(I=10 (\sin \omega t-30^\circ\)). Calculate the power consumed in this circuit:

Q8. A resistor of \(8\:\Omega\) and a capacitor of \(178\:\mu F\) are connected in series to a 250V, 50 Hz supply. Net impedance of the circuit is given by \(19.6\:\Omega\) . What is the value of reactive power?

Q9. Two coils, each one having self inductance of 10 H. are coupled such that the mutual inductance between them is 4 H. Find the coefficient of the coupling between the coils.

Q10. An iron cored coil has resistance R and inductance L. It is connected across a capacitor C. At resonance this circuit behaves like

Record & Track Your Performance

March
Week # 1 Quiz 1