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