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Question

The Work done by the motor per unit time is called _________________.

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

power

The correct answer is Option 1 i.e. Power.

Power is defined as the work done per unit time.

Formula:

Power=Work / Time

Other Options :

  • Acceleration: Rate of change of velocity — unrelated to work or time.

  • Energy: Capacity to do work — not specifically work per unit time.

  • Momentum: Product of mass and velocity — deals with motion, not work/time.

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Similar Questions

  1. ______ is defined as the time rate at which work is done or energy is transferred.
  2. When one joule of energy is consumed in one second, then the power used is said to be?
  3. A girl of mass 40 kg climbs up a rope through a height of 6 m in 16 s. The power expended by her is ______. (Take \(g = -10\text{ m/s}^2\))

  4. Which of the following is an INCORRECT formula for power?


Important Questions from Power

  1. Express the power dissipated in a 100 Ω resistor in dB relative to 1 mW, when the voltage across the resistor is 1.0 Vrms

  2. An elevator weighing 500 kg is to be lifted up at a constant velocity of 0.25 m/s. What would be the minimum horsepower of the motor to be used? G = 9.8 m/s2 and there is no frictional loss.

  3. How many units of electric power will be consumed by 4 motors of 0.5 HP each in 8 hours?

  4. Which of the following is not equivalent of Watts?

  5. ______ is defined as the time rate at which work is done or energy is transferred.
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