RRB Previous Year Physics Questions

An iron spherical ball having an external volume of 10 cm³ is dipped in a beaker containing water of specific gravity 1 gm/cm³. The weight of the ball would be reduced by-

  • Collecting more data for making the calculation
  • 0.1 gm
  • 1 gm
  • 10 gm

Archimedes Principle is related to-

  • Laws of flotation
  • Right-angled triangle
  • Laws of gravity
  • The relation between current and voltage

A wire of a certain length has a resistance of 2.2 Ω. If the wire is stretched to twice its original length, then find the new resistance?

  • 8.8 Ω
  • 1.1 Ω
  • 2.2 Ω
  • 4.4 Ω

The safe temperature to keep eatables fresh in a refrigerator is-

  • 4 °C
  • 0 °C
  • 18 °C
  • 10 °C

Dynamo converts-

  • Electrical energy into mechanical energy
  • High voltage into low voltage
  • Low voltage into high voltage
  • Mechanical energy into electrical energy

The instrument used to measure the electric current is

  • Barometer
  • Altimeter
  • Ammeter
  • Anemometer

The best conductor of electricity is-

  • Aluminum
  • Copper
  • Iron
  • Silver

A body strikes the floor vertically with a velocity u and rebounds at the same speed. The change of speed would be-

  • 3 u
  • zero
  • 1 u
  • 2 u

Which of the following is different from others?

  • Speed
  • Time
  • Density
  • Force

Momentum has the same unit as that of-

  • Torque
  • Couple
  • Impulse
  • Moment of Momentum

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