The SI unit of energy is:
Correct answer: A. Joule
- A. Joule
- B. Calorie
- C. Slug
- D. Electron volt
Explanation
The Joule is the SI unit of energy and is defined as the amount of work done when a force of one Newton acts on a point that moves one meter in the direction of the force. Mathematically, 1J=1N⋅m. The Joule is a fundamental unit in the International System of Units (SI) and is widely used to measure various forms of energy, including mechanical, thermal, and electromagnetic energy.
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About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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