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DSSSB TGT Physics — practice by topic

Browse 226 questions across 30 Physics topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Physics topics

The Human Eye and the Colourful World (31)Sound (29)Sound Waves (29)Electricity (26)Sources of Energy (23)Magnetic Effects of Electric Current (22)Motion (20)Force (17)Laws of Motion (17)Physics and Measurement (17)Newton's laws (15)Work and Energy (11)Workenergy (11)C9kineticenergy (9)Light - Reflection and Refraction (9)C9powermachines (7)C10lensformula (5)C10mirrorformula (5)C10refractionlenses (5)C9newtonsecond (4)C10magneticeffects (2)C9forceconcept (2)C9work (2)Class9 Motion Basics (2)Current Affairs (2)C10reflectionmirrors (1)C9newtonfirst (1)C9newtonthird (1)C9potentialconservation (1)Light (1)

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Sound is produced by:Read the answer and worked solution →Sound waves are an example of:Read the answer and worked solution →Sound CANNOT travel through:Read the answer and worked solution →In a sound wave, a region where the density of the medium is HIGHER than average is called a:Read the answer and worked solution →

Worked practice questions

Sound is produced by:

  1. Stationary objects
  2. Heated objects only
  3. Vibrating objects
  4. Magnetic objects
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Correct answer: C. Vibrating objects

Sound is produced by vibrations of an object — a struck bell, plucked rubber band, vibrating air column in a flute, or the vocal cords in our throat. When the vibration stops, the sound stops.

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Sound waves are an example of:

  1. Longitudinal waves
  2. Electromagnetic waves
  3. Transverse waves
  4. Stationary waves
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Correct answer: A. Longitudinal waves

In sound waves, particles of the medium vibrate PARALLEL to the direction of wave propagation — this is the defining feature of a longitudinal wave. Transverse waves (like light, water surface waves) have particles vibrating perpendicular to the wave direction.

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Sound CANNOT travel through:

  1. Water
  2. Air
  3. Vacuum
  4. Steel
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Correct answer: C. Vacuum

Sound is a vibration of particles of a medium. A vacuum has no particles to vibrate, so sound cannot propagate through it. Astronauts on a spacewalk cannot hear each other through the vacuum of space — they communicate via radio (electromagnetic waves, which need no medium).

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