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TRB Model Physics Questions and Answers

TRB Model Questions
1. The direction of magnetic field due to a current element is given by
 
  • A. Faraday's first law
  • B. Fleming's right hand rule
  • C. Fleming's left hand rule
  • D. Ampere's swimming rule
Answer: D.
Ampere's swimming rule
 
2. The diameter of the atomic nucleus is of the order of
 
  • A. 10-14 m
  • B. 10-14 cm
  • C. 10-8 cm
  • D. 10-8 m
Answer: A.
10-14 m
 
 
3. Latent heat of ice has the value
 
  • A. 80 J/kg
  • B. 3.34 x 105 J kg
  • C. 22.57 x 105 J/kKg
  • D. 540 J/kg
Answer: B.
3.34 x 105 J kg
 
4. ______ rays are used in the treatment of skin disorders.
 
  • A. IR rays
  • B. UV rays
  • C. X-rays
  • D. Gamma rays
Answer: B.
UV rays