Q.41)-When a vehicle passes, TV reception gets distorted. This is because
  • Metal reflects radiowaves
  • Spark plug creats electromagnetic disturbances
  • Vehicle pollution affects the performance of the TV components
  • Modern vehicles use electro-ignition system
Q.42)-Where are mesons found?
  • Cosmic rays
  • X-rays
  • Gamma rays
  • Laser beam
Q.43)-What is the full form of 'AM' regarding radio broadcasting?
  • Amplitude Movement
  • Anywhere Movement
  • Amplitude Matching
  • Amplitude Modulation
Q.44)-The scientist who first sent electromagnetic waves to distant places is
  • James Clerk Maxwell
  • Heinrich Hertz
  • Thomas Alva Edison
  • John Logie Baired
Q.45)-The audio signals of TV are
  • Amplitude modulated
  • Frequency modulated
  • Unmodulated
  • Velocity modulated
Q.46)-Tape recorder should not be kept near one of the following things:
  • Clock
  • Magnet
  • Electrical switchboard
  • Radio
Q.47)-Night photography and photography in mist and fog are possible using
  • Ultraviolet Radiation
  • Infra-red Radiation
  • Microwave Radiation
  • Gamma Radiation
Q.48)-Forged documents are detected by
  • Ultraviolet rays
  • Infra-red rays
  • Beta rays
  • Gamma rays
Q.49)-In the remote control of television, electromagnetic waves used are
  • Ultraviolet
  • Microwave
  • Radiowave
  • Infrared
Q.50)-Which of the following waves has the highest frequency?
  • Radio
  • Infrared
  • Microwaves
  • Gamma Rays