Recent content by chandra.phys

  1. C

    Why is potential energy negative?

    If you have taken the surface of the Earth as the reference point for your potential energy, then the potential energy of a body of mass m at a height h (small compared to Earth's radius) is mgh. It is a positive quantity with respect to the reference point. The total energy in such a case is...
  2. C

    Discussions on certain questions.

    Should I assume electromagnetic force is a typing error for electromotive force, and choose C. Or should i say potential difference is work done on a unit charge in moving it from one point to another. This work is stored as potential energy. So, this leads to choice B. Or should i raise my...
  3. C

    Discussions on certain questions.

    Q. No. 1. If Watt measures power, what does volt measure? A. Electrical current B. Energy C. Electromagnetic force D. Electrical resistance Q.No. 2. Which of the following statements is false? A. A body can have zero velocity and still be accelerated B. A body can have a...
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