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NEET PHYSICSUNITS AND MEASUREMENTSEasy

Question

The unit of power is:

A

Joule

B

Joule per second only

C

Joule per second and watt both

D

Only watt

Step-by-Step Solution

Power is defined as the time rate at which work is done or energy is transferred (P=W/tP = W/t).

  1. Derived Unit: Since the SI unit of work is the Joule (J) and the SI unit of time is the second (s), the unit of power is Joule per second (Js−1J s^{-1}).
  2. SI Unit Name: In the International System of Units (SI), this unit (1Js−11 J s^{-1}) is given the special name watt (W) in honour of James Watt.
  3. Conclusion: Since 1 watt is defined exactly as 1 joule per second, both terms represent the unit of power .

Exam Context & Concepts Covered

This question aligns with the NEET PHYSICS syllabus, specifically targeting concepts from UNITS AND MEASUREMENTS. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

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