In SI system, the unit of energy is:
Correct answer: B. Joule
- A. Calorie
- B. Joule
- C. Erg
- D. Dyne
Explanation
The joule (J) is the SI unit of energy. It is defined as one newton-meter, which is the work done when a force of one newton acts over a distance of one meter. The joule is a fundamental unit and is widely used in scientific and engineering contexts to measure various forms of energy, such as kinetic energy, potential energy, and thermal 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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