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Physics General Knowledge Questions and Answers

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1. Who discovered x-ray?
 
  • A. Einstein
  • B. J.J. Thomson
  • C. Madam Curie
  • D. Roentgen
Answer: D.
Roentgen
 
2. Magnetron is used for the production of
 
  • A. Positive rays
  • B. Cathode rays
  • C. X-rays
  • D. Microwaves
Answer: D.
Microwaves
 
 
3. Joule is the unit of
 
  • A. pressure
  • B. energy
  • C. electric potential
  • D. temperature
Answer: B.
energy
 
4. The smallest planet in the solar system is
 
  • A. pluto
  • B. mercury
  • C. earth
  • D. mars
Answer: A.
pluto