Physics GK Questions & Answers

(Important for Upcoming UPSC/SSC Exams)

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1. The law of electrolysis was formulated by?
Answer: Michael Faraday
2. Father of Electricity?
Answer: Michael Faraday
3. The ordered flow of charges in a conductor is called?
Answer: Electric current
4. The unit of current?
Answer: Ampere
5. The substance that allows electric charges to flow through it?
Answer: Conductor
6. The best conductor of Electricity?
Answer: Silver
7. The substance that does not allow current to flow through it?
Answer: Insulators
8. The unit of electric charge?
Answer: Coulomb
9. A device that maintains a constant potential difference across its terminals for a long time?
Answer: Cell
10. The fuse is a piece of wire made of?
Answer: Bismuth alloy
11. The instrument used to measure electric current in a circuit is called?
Answer: Ammeter
12. Unit of electric potential?
Answer: Volt
13. Commercial unit of electricity?
Answer: KWH (Kilowatt Hour)
14. An instrument used to measure the electrical energy consumed in Kwh?
Answer: Watt-hour meter
15. The potential difference measured in volt is called?
Answer: Voltage
16. The EMF of a dry cell is:
Answer: 1.5 volt
17. The source of EMF containing two or more cells is called?
Answer: Battery
18. The electric current which changes its direction at regular intervals of time?
Answer: Alternating Current (AC)
19. Voltage of AC in our household circuit?
Answer: 230 V
20. Electric current flowing always in the same direction?
Answer: Direct Current (DC)