Question
The energy required to remove an electron in a hydrogen atom from $n = 10$ state is
✓
Answer
(c) Energy required$=\frac{13.6}{{{n}^{2}}}=\frac{13.6}{{{10}^{2}}}=0.136\,eV$
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
Assume that an electric field $\vec E = 30{x^2}\hat i$ exists in space. Then the potential difference $V_A-V_O$ where $V_O$ is the potential at the origin and $V_A$ the potential at $x = 2\ m$ is....$V$
→If specific heat of a substance is infinite, it means
One end of a straight uniform $1\; \mathrm{m}$ long bar is pivoted on horizontal table. It is released from rest when it makes an angle $30^{\circ}$ from the horizontal (see figure). Its angular speed when it hits the table is given as $\sqrt{\mathrm{n}}\; \mathrm{s}^{-1},$ where $\mathrm{n}$ is an integer. The value of $n$ is
→A particle of mass $0.2 \ kg$ is moving in one dimension under a force that delivers a constant power $0.5 \ W$ to the particle. If the initial speed (in $ms ^{-1}$ ) of the particle is zero, the speed $\left(\right.$ in $ms ^{-1}$ ) after $5s$ is :
→The adiabatic elasticity of hydrogen gas $(\gamma = 1.4)$ at $NTP$ is
→An object is placed in a medium of refractive index $3$. An electromagnetic wave of intensity $6 \times 10^8 \mathrm{~W} / \mathrm{m}^2$ falls normally on the object and it is absorbed completely. The radiation pressure on the object would be (speed of light in free space $=3 \times 10^8 \mathrm{~m} / \mathrm{s}$ ):
→Average energy stored in a pure inductance $L$ when a current $i$ flows through it, is
→Four lowest energy levels of $H-$atom are shown in the figure. The number of possible emission lines would be
→The angular speed of truck wheel is increased from $900\, rpm$ to $2460\, rpm$ in $26$ seconds. The number of revolutions by the truck engine during this time is
→(Assuming the acceleration to be uniform).
Two men $'A'$ and $'B'$ are standing on a plank. $'B'$ is at the middle of the plank and $'A'$ is at the left end of the plank. Bottom surface of the plank is smooth . System is initially at rest and masses are as shown in figure. $'A'$ and $'B'$ start moving such that the position of $'B'$ remains fixed with respect to ground and $'A'$ meets $'B'$. Then the point where $A$ meets $B$ is located at
→