Govt Exams Mock Test FREE | Online Quiz Competition

Q1. A single phase half wave diode rectifier with RE load is supplied by a source voltage of 230 V, 50 Hz and for R=18 ohm , E=100 V. Find the peak inverse voltage(PIV) of diode

130.18 V

425.26 V

560.21 V

330 V

Q2. Assertion (A): Inverters and choppers use fast-switching thyristors
Reason (R): Fast-switching SCR has a low turn-off time.

Both A and R are correct and R is correct explanation of A

Both A and R correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

Q3. The di/dt rating of an SCR is specified for its

Decaying anode current

decaying gate current

Raising gate current

rising anode current

Q4. The input frequency used in half wave and full wave rectifier is 50 HZ. Then the output has a frequency of Hz, Hz.

50, 50

100, 100

50, 100

100, 50

Q5. A power MOSFET has three terminals called_________.

source, drain and gate

emitter, base and collector

base, source and drain

gate, emitter and collector

Q6. Optocouplers combine

SIT and BJTS

IGBTS and MOSFETS

Diode and BJT

Infrared LED and a silicon photo transistor.

Q7. The average value of load voltage in a half-wave converter with resistive load can be varied by varying the thyristor firing angle. What is the relation between firing angle \((\alpha\)) and conduction angle \((\delta)\)?

\(\delta = \pi - \alpha\)

\(\delta = 2\pi - \alpha\)

\(\delta = 2(\pi - \alpha)\)

\(\delta = \pi - 2\alpha\)

Q8. Creeping is the phenomenon which occurs in

Voltmeter

Wattmeter

Energy meter

Ammeter

Q9. An ammeter is a

absolute instrument

recording instrument

integrating instrument

secondary instrument

Q10. Which of the following current transformers should saturate faster.

Capacitive current transformer

Protective current transformer

Measuring current transformer

Inductive current transformer

Quiz

Year 2023

August
Week # 4 Quiz 2

Q1. A single phase half wave diode rectifier with RE load is supplied by a source voltage of 230 V, 50 Hz and for R=18 ohm , E=100 V. Find the peak inverse voltage(PIV) of diode

Q2. Assertion (A): Inverters and choppers use fast-switching thyristors
Reason (R): Fast-switching SCR has a low turn-off time.

Q3. The di/dt rating of an SCR is specified for its

Q4. The input frequency used in half wave and full wave rectifier is 50 HZ. Then the output has a frequency of Hz, Hz.

Q5. A power MOSFET has three terminals called_________.

Q6. Optocouplers combine

Q7. The average value of load voltage in a half-wave converter with resistive load can be varied by varying the thyristor firing angle. What is the relation between firing angle \((\alpha\)) and conduction angle \((\delta)\)?

Q8. Creeping is the phenomenon which occurs in

Q9. An ammeter is a

Q10. Which of the following current transformers should saturate faster.

Quiz

Year 2023

September Week # 2 Expire on 07 Oct 2023

September Week # 3 Expire on 14 Oct 2023

September Week # 4 Expire on 21 Oct 2023

October Week # 1 Expire on 31 Oct 2023

August Week # 4 Quiz 2

Q1. A single phase half wave diode rectifier with RE load is supplied by a source voltage of 230 V, 50 Hz and for R=18 ohm , E=100 V. Find the peak inverse voltage(PIV) of diode

Q2. Assertion (A): Inverters and choppers use fast-switching thyristors Reason (R): Fast-switching SCR has a low turn-off time.

Q3. The di/dt rating of an SCR is specified for its

Q4. The input frequency used in half wave and full wave rectifier is 50 HZ. Then the output has a frequency of ____ Hz, ____ Hz.

Q5. A power MOSFET has three terminals called_________.

Q6. Optocouplers combine

Q7. The average value of load voltage in a half-wave converter with resistive load can be varied by varying the thyristor firing angle. What is the relation between firing angle \((\alpha\)) and conduction angle \((\delta)\)?

Q8. Creeping is the phenomenon which occurs in

Q9. An ammeter is a

Q10. Which of the following current transformers should saturate faster.

Record & Track Your Performance

August
Week # 4 Quiz 2

Q2. Assertion (A): Inverters and choppers use fast-switching thyristors
Reason (R): Fast-switching SCR has a low turn-off time.

Q4. The input frequency used in half wave and full wave rectifier is 50 HZ. Then the output has a frequency of Hz, Hz.