If Planck's constant \((h)\) and speed of light in a 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?
| (a) | mass of the electron \((m_e)\) |
| (b) | universal gravitational constant \((G)\) |
| (c) | charge of an electron \((e)\) |
| (d) | mass of proton \((m_p)\) |
| 1. | (a), (c), and (d) only |
| 2. | (a), (b), and (d) only |
| 3. | (a), (b), and (c) only |
| 4. | (b), (c), and (d) only |
© 2026 GoodEd Technologies Pvt. Ltd.
