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JEE PHYSICS MCQ: UNITS & MEASUREMENTS

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Analyzing +4 | -1

If Planck's constant

(h)

and speed of light in vacuum

(c)

are taken as two fundamental quantities, which one of the following can, in addition, be taken to express length, mass and time in terms of the three chosen fundamental quantities?

(i) Mass of electron

\left(m_e\right)

(ii) Universal gravitational constant

(G)

(iii) Charge of electron

(e)

(iv) Mass of proton

\left(m_p\right)

View answer and explanation

Correct option: A

(i), (ii) and (iii)

The correct answer is A ((i), (ii) and (iii)) because these quantities, along with Planck's constant and speed of light, can be used to express length, mass, and time in terms of fundamental quantities.

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