Indian History Test
4. In the case of insulators, as the temperature decreases, resistivity
  • Decreases
  • Increases
The least count of a metre scale is
  • 1 m
  • 1 cm
  • 1 mm
  • 0.01 mm
The charge of an electron (in Coulombs) is
  • 1.206 x 10-19 kg
  • 1.602 x 1019 kg
  • 1.062 x 10-19 kg
  • 1.602 x 10-19 kg
A cyclotron can accelerate
  • Ions
  • Atoms
  • Neutrons
  • Gamma rays
Nichrome wire is used as the heating element because it has
  • Low specific resistance
  • Low melting point
  • High conductivity
  • High specific resistance
By which one of the following, an old written material which cannot be read easily, can be read?
  • X rays
  • IR rays
  • Alpha rays
  • Beta rays
Who invented the laser?
  • Sir Frank Whittle
  • Charles H. Townes
  • Fred Morrisson