Related Questions

  1. A Galilean telescope has an objective of focal length 100 cm and magnifying power 50
  2. A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by
  3. Maximum velocity of the photoelectron emitted by a metal is 1.8×10⁶ ms⁻¹.
  4. The threshold wavelength for photoelectric emission from a material is 4800 Å.
  5. The ratio of the weight of a man in a stationary lift and when it is moving downwards