GK Questions with answers on Science Physics (Magnetic field of electric Current) Set V
GK Questions with answers on Science Physics (Magnetic field of electric Current) Set V ,in this set you will find repository of 10 Objective Type Questions that will help you to attune and equipped for different competitive examinations like UPSC-prelims, IAS-prelims, NDA, CDS, SSC, State Services etc as well as academic examinations.
1. If the current reverses direction after equal intervals of time, it is called:
A. Direct current
B. Alternating current
C. Induced current
D. Ionic current
Ans: B
2. At what time interval does the alternating current produced in India reverse its direction?
A. 1/100 second
B. 5 seconds
C. 1 minute
D. 5 minutes
Ans: A
3. Which of the following are the sources for producing alternating current?
A. Power house generators
B. Bicycle dynamos
C. Car alternators
D. All of the above
Ans: D
4. Which of the following convert’s mechanical energy into electrical energy?
A. Refrigerator
B. Fan
C. Electric motor
D. Electric generator
Ans: D
5. What is the frequency of alternating current produced in India?
A. 15 Hz
B. 50 Hz
C. 55 Hz
D. 65 Hz
Ans: B
6. In generators, the voltage produced can be increased by:
A. Coil with more turns
B. Rotating coil faster
C. Using coil with larger area
D. All of the above
Ans: D
7. Which of the following parts of the generators is stationary to produce electricity in large powerhouses?
A. Coil
B. Electromagnet
C. Slip rings
D. Carbon brush
Ans: A
8. Which of the following parts is not there in A.C. generator?
A. Slip rings
B. Coil
C. Commutator
D. Galvanometer
Ans: C
9. Where do we use transformers?
A. Power stations
B. Radio sets
C. Television
D. All of the above
Ans: D
10. How much electric potential does the live wire carry?
A. 100 volts
B. 150 volts
C. 185 volts
D. 20 volts
Ans: D