MCQ
The minimum energy required to excite a hydrogen atom from its ground state is
- A$13.6\ eV$
- B$-13.6\ eV$
- C$3.4\ eV$
- ✓$10.2\ eV$
✓
Answer
Correct option: D.
$10.2\ eV$
Minimum energy required to excite from ground state $=13.6\left[\frac{1}{1^2}-\frac{1}{2^2}\right]=10.2\ \mathrm{eV}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A gas is suddenly compressed to one fourth of its original volume. What will be its final pressure, if its initial pressure is $P$
→If current in an electric bulb changes by $1 \%$, then the power will change by
→The current flowing in a coil of self inductance $0.4 \mathrm{mH}$ is increased by $250 \mathrm{~mA}$ in $0.1 \mathrm{sec}$. The e.m.f. induced will be
→All of the following statements are correct except
The kinetic energy possessed by a body of mass $m$ moving with a velocity $v$ is equal to $\frac{1}{2} m v^2$, provided
→In a region of uniform magnetic induction $B=10^{-2}$ tesla, a circular coil of radius $30 cm$ and resistance $\pi ohm$ is rotated about an axis which is perpendicular to the direction of $B$ and which forms a diameter of the coil. If the coil rotates at $200 rpm$ the amplitude of the alternating current induced in the coil is
→An electric potential difference will be induced between the ends of the conductor shown in the diagram, when the conductor moves in the direction
Two cars $A$ and $B$ at rest at same point initially. If $A$ starts with uniform velocity of $40 m / sec$ and $B$ starts in the same direction with constant acceleration of $4 m / s ^2$, then $B$ will catch $A$ after how much time
→The instantaneous velocity of a body can be measured
An area of cross-section of rubber string is $2 cm ^2$. Its length is doubled when stretched with a linear force of $2 \times 10^5$ dynes. The Young's modulus of the rubber in dyne $/ cm ^2$ will be
→