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Physics Questions Answers

  • 43. Energy posses by a body in motion is called

    1. Kinetic Energy
    2. Potential Energy
    3. Both of Above
    4. None of Above
    Answer And Explanation

    Answer: Option A

  • 44. Electric Motor converts

    1. Electrical energy into mechanical energy
    2. Mechanical energy into Electrical energy
    3. Electrical energy into light energy
    4. None of above
    Answer And Explanation

    Answer: Option A

  • 45. Solar cell converts

    1. Sound energy into electrical energy
    2. Electrical energy into mechanical energy
    3. Solar energy into electrical energy
    4. Electrical energy into light energy
    Answer And Explanation

    Answer: Option C

  • 46. If lift is going up with acceleration, the apparent weight of a body is

    1. may be more or less than true weight
    2. equal to the true weight
    3. less than the true weight
    4. more than the true weight
    Answer And Explanation

    Answer: Option D

  • 47. All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit.

    1. True
    2. False
    Answer And Explanation

    Answer: Option A

  • 48. Orbital speed of a satellite is dependent of its mass.

    1. True
    2. False
    Answer And Explanation

    Answer: Option B

    Explanation:

    Orbital speed of a satellite is independent of its mass.

  • 49. What is escape velocity ?

    1. Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so it do not go beyond gravitational field of earth.
    2. Escape velocity is the minimum velocity with which a body should be projected from the surface of earth so it do not go beyond gravitational field of earth.
    3. Escape velocity is the minimum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth.
    4. Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth.
    Answer And Explanation

    Answer: Option C