RRB Previous Year Physics Questions

When two bodies are rubbed against each other-

  • They acquire equal and similar charges
  • They acquire equal and opposite charges
  • They acquire unequal and similar charges
  • They acquire unequal and opposite charges

Lightning is caused in the sky due to the flow of charge between-

  • Two oppositely charged clouds
  • Two similarly charged clouds
  • One neutral and one charged cloud
  • None of these

Which of these converts sunlight directly into electrical energy?

  • Solar cooker
  • Solar cell
  • Solar furnace
  • Solar water heater

Electric charge can flow through-

  • Insulators
  • Conductors
  • Both insulators and conductors
  • Neither conductors nor insulators

The electric current which changes its direction after fixed intervals of time is called-

  • Induced current
  • Direct current
  • Alternating current
  • None of these

A device used to stabilize the voltage supplied by electric supply station is a-

  • Dynamo
  • Transformer
  • Ammeter
  • Generator

Silver is a-

  • Magnetic substance
  • Good conductor of electricity
  • A bad conductor of electricity
  • None of these

An instrument used to observe heavenly bodies is the-

  • Telescope
  • Camera
  • Microscope
  • Periscope

The maximum percentage in the atmosphere is of-

  • Oxygen
  • Nitrogen
  • Carbon dioxide
  • Helium

The colors on a color code resistor are green, white, orange and silver. Find the value of resistor-

  • 5.9 × 10³ ±10%
  • 59 × 10³ ± 10%
  • 590 × 10³ ±10%
  • 5900 × 10² ± 10%

The eddy current loss is directly proportional to-

  • Area of metal
  • Volume of metal
  • Length of metal
  • Weight of metal

The direction of dynamically induced e.m.f is given by-

  • Lenz’s law
  • Flemings right-hand rule
  • Flemings left-hand rule
  • Corkscrew rule

The basis for measuring a thermodynamic property of temperature is given by-

  • Zeroth law of thermodynamics
  • The first law of thermodynamics
  • The second law of thermodynamics
  • Third law of thermodynamics

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