Question

The total energy of an electron in an orbit of hydrogen atom is \( E \). The potential energy of the electron in the same orbit is

• A. \( E \)
• B. \( \frac{E}{2} \)
• C. \( 2E \)
• D. \( 3E \)

Hint:

Remember that in a hydrogen atom, the total energy is half of the potential energy.

Answer 1

The Correct Option is C

For hydrogen atom, total energy \( E = - \frac{k}{r} \) and potential energy \( U = - \frac{k}{r} \). Since the potential energy is half the total energy, we have \( U = -E/2 \).