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Physics Questions and Answers

89. The instrument which is used to measure the current flowing through a circuit is
 
  • A. volt meter
  • B. ammeter
  • C. ohm meter
  • D. magnetometer
 
 
90. The spectrum of a source of light is called
 
  • A. line spectrum
  • B. continuous spectrum
  • C. band spectrum
  • D. emission spectrum
 
91. Laser is a device to produce
 
  • A. magnetic waves
  • B. microwaves
  • C. coherent waves
  • D. x–rays
 
92. Which one of the following cannot pass through vacuum?
 
  • A. sound
  • B. electric field
  • C. magnetic field
  • D. light