RRB JE Electrical question paper with solution 2012 | RRB JE Electrical
Ques.1. What is the value of knee voltage of silicon diode?
- 0.3 V
- 0.33 V
- 0.7 V
- 1.1 V
Ques.2. There are 20 Volts across the inductor and 15 volts across the resistance in the A.C supplied series R-L circuit. What would be the supply voltage?
- 20 volts
- 15 volts
- 25 volts
- 17.5 volts
Ques.3. A transformer mainly transforms
Ques.4. What is the power factor of a pure resistor circuit?
Ques.5. ________ is used to heat the non-conductor
- Eddy current heating
- Arc heating
- Induction heating
- Dielectric heating
Ques.6. What is the S.I unit of magnetic flux density?
Ques.7. Which type of oscillator is most stable in a simple circuit?
- Crystalline oscillator
- Clapp oscillator
- Colpitts oscillator
- Armstrong oscillator
Ques.8. What is the proper use of a signal generator?
- All of the above
Ques.9. The electrostatic instrument relay for their operation upon the
- Fact that a force exist between the two plates having opposite charges
Ques.10. The unit of resistivity is