Class X

Ratio of voltages is inverse ratio of the
  1. Transformer
  2. Resistor
  3. Iron core
  4. Current
 1 rad is equal to
  1. 57.3°
  2. 54°
  3. 45°
  4. 90°
 A 20 cm wire carrying current of 10 A with magnetic field 0.30 T having angle 40° will produce force of
  1. 0.21 N
  2. 0.25 N
  3. 0.31 N
  4. 0.39 N
Work done by force of gravity on a satellite of 500 N at height is
  1. 0 J
  2. 1 J
  3. 2 J
  4. 3 J
Fractional change in resistance per kelvin is known as
  1. Temperature constant
  2. Resistance coefficient
  3. Temperature coefficient
  4. Resistance constant
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