Govt Exams Mock Test FREE | Online Quiz Competition

Q1. The Boolean expression \(\overline{A\cdot B}\) is used for _____ gate.

XOR

NAND

NOT

NOR

Q2. A single phase half wave rectifier is feeding a resistive load. When \(\alpha = 0\), dc output voltage is 134 V. When \(\alpha = 45°\), the dc output voltage will be about

110.5 V

94.7 V

228.7 V

114.4 V

Q3. A single-phase full-bridge voltage source inverter (VSI) is fed from a 300 V battery. A pulse of 120° duration is used to trigger the appropriate devices in each half-cycle. The rms value of the fundamental component of the output voltage, in volts, is

234

245

300

331

Q4. A single-phase full-wave uncontrolled bridge rectifier is supplying aresistive load of 22 \(\Omega\), the load current is assumed to be smooth and ripple –free. If the supply voltage is 220V, 50Hz , Calculate the rms output current.

11A

10A

20.07A

10.35 A

Q5. A dc voltage source of is supplying R-L load through an SCR with pulse width of \(100 \mu s\). Latching current of SCR is 100 mA in case load consists of R = 20 \(\Omega\) in series with L = 0.5 H.

250 V

100 V

150 V

200 V

Q6. A boost converter has input voltage of 5 V and it operates at 20 kHz. When the average output voltage \(V_o= 10\: V\) , the average load current \(I_o= 0.8 \:A\) . Determine the critical value of the capacitance C.

\(2\: \mu F\)

\(4\: \mu F\)

\(3\: \mu F\)

\(1\: \mu F\)

Q7. What are the states of the three ideal diodes of the circuit shown in Fig.?

\

D1 ON, D2 OFF, D3 OFF

D1 ON, D2 OFF, D3 ON

D1 OFF, D2 ON, D3 OFF

D1 OFF, D2 ON, D3 ON

Q8. The reverse recovery time of diode is \(t_{rr} = 3.5 \mu s\) and the rate of change of the diode current is \(di/dt = 20 A/ \mu s\). The stored charge \(Q_{RR}\) is _______

\(122.5\: \mu s\)

\(125\: \mu s\)

\(135\: \mu s\)

\(132.5\: \mu s\)

Q9. Which of the following diode has the least reverse recovery time?

General purpose diode

Fast recovery diode

Both (A) and (B)

Silicon carbide diode

Q10. In current source inverter (CSI), if the frequency of voltage input to CSI is 'f' Hz, then the frequency of the output voltage is_____________Hz.

f

f/2

2f

3f

Quiz

Year 2025

January
Week # 4 Quiz 1

Q1. The Boolean expression \(\overline{A\cdot B}\) is used for _____ gate.

Q2. A single phase half wave rectifier is feeding a resistive load. When \(\alpha = 0\), dc output voltage is 134 V. When \(\alpha = 45°\), the dc output voltage will be about

Q3. A single-phase full-bridge voltage source inverter (VSI) is fed from a 300 V battery. A pulse of 120° duration is used to trigger the appropriate devices in each half-cycle. The rms value of the fundamental component of the output voltage, in volts, is

Q4. A single-phase full-wave uncontrolled bridge rectifier is supplying aresistive load of 22 \(\Omega\), the load current is assumed to be smooth and ripple –free. If the supply voltage is 220V, 50Hz , Calculate the rms output current.

Q5. A dc voltage source of is supplying R-L load through an SCR with pulse width of \(100 \mu s\). Latching current of SCR is 100 mA in case load consists of R = 20 \(\Omega\) in series with L = 0.5 H.

Q6. A boost converter has input voltage of 5 V and it operates at 20 kHz. When the average output voltage \(V_o= 10\: V\) , the average load current \(I_o= 0.8 \:A\) . Determine the critical value of the capacitance C.

Q7. What are the states of the three ideal diodes of the circuit shown in Fig.?

\

Q8. The reverse recovery time of diode is \(t_{rr} = 3.5 \mu s\) and the rate of change of the diode current is \(di/dt = 20 A/ \mu s\). The stored charge \(Q_{RR}\) is _______

Q9. Which of the following diode has the least reverse recovery time?

Q10. In current source inverter (CSI), if the frequency of voltage input to CSI is 'f' Hz, then the frequency of the output voltage is_____________Hz.

Quiz

Year 2025

January Week # 2 Expire on 07 Feb 2025

January Week # 3 Expire on 14 Feb 2025

January Week # 4 Expire on 21 Feb 2025

February Week # 1 Expire on 28 Feb 2025

January Week # 4 Quiz 1

Q1. The Boolean expression \(\overline{A\cdot B}\) is used for _____ gate.

Q2. A single phase half wave rectifier is feeding a resistive load. When \(\alpha = 0\), dc output voltage is 134 V. When \(\alpha = 45°\), the dc output voltage will be about

Q3. A single-phase full-bridge voltage source inverter (VSI) is fed from a 300 V battery. A pulse of 120° duration is used to trigger the appropriate devices in each half-cycle. The rms value of the fundamental component of the output voltage, in volts, is

Q4. A single-phase full-wave uncontrolled bridge rectifier is supplying aresistive load of 22 \(\Omega\), the load current is assumed to be smooth and ripple –free. If the supply voltage is 220V, 50Hz , Calculate the rms output current.

Q5. A dc voltage source of is supplying R-L load through an SCR with pulse width of \(100 \mu s\). Latching current of SCR is 100 mA in case load consists of R = 20 \(\Omega\) in series with L = 0.5 H.

Q6. A boost converter has input voltage of 5 V and it operates at 20 kHz. When the average output voltage \(V_o= 10\: V\) , the average load current \(I_o= 0.8 \:A\) . Determine the critical value of the capacitance C.

Q7. What are the states of the three ideal diodes of the circuit shown in Fig.?\

Q8. The reverse recovery time of diode is \(t_{rr} = 3.5 \mu s\) and the rate of change of the diode current is \(di/dt = 20 A/ \mu s\). The stored charge \(Q_{RR}\) is _______

Q9. Which of the following diode has the least reverse recovery time?

Q10. In current source inverter (CSI), if the frequency of voltage input to CSI is 'f' Hz, then the frequency of the output voltage is_____________Hz.

Record & Track Your Performance

January
Week # 4 Quiz 1

Q7. What are the states of the three ideal diodes of the circuit shown in Fig.?

\