Class X

Quantity which is not a physical quantity is
  1. Mass
  2. Stress
  3. Length
  4. Velocity
If a body has 200 kg mass and its velocity gets reduced from 25 m s-1 to 20 m s-1 in 4 seconds, average retarding force on a body will be
  1. −200 N
  2. 200 N
  3. −250 N
  4. 250 N
If a body moving with initial, constant velocity of 10 m s-1, accelerates for 2 seconds at a constant rate of 12 m s-2, final velocity of body will be
  1. 30 m s-1
  2. 34 m s-1
  3. 40 m s-1
  4. 45 m s-1
Device used to measure potential difference between two points in volts is known as
  1. Ohmmeter
  2. Odometer
  3. Ammeter
  4. Voltmeter
"Candela", according to system international is a
  1. Base unit
  2. Derived unit
  3. Supplementary unit
  4. International unit
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