Class X

 Definition and standards of physical quantities were established in
  1. 1910
  2. 1920
  3. 1950
  4. 1960
Change in kinetic energy is measured as difference of
  1. 1/2(mv)²
  2. (mv)²
  3. 1/2(mv)
  4. 1/2(m)²
If turn ratio of a transformer is 10, it means that
  1. Is = 10Ip
  2. Ip = 10Is
  3. Ns = 10Np
  4. Both a and b
In 1909, Millikan devised technique for measurement of
  1. Charge on electron
  2. Charge on cathode
  3. Charge on neutron
  4. Charge on proton
At low temperature, body emits radiations of
  1. Shorter wave length
  2. High frequencies
  3. Longer wavelength
  4. Low frequencies
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