MCQ
$X-$ rays are produced due to
- ABreak up of molecules
- ✓Changing in atomic energy level
- CChanging in nuclear energy level
- DRadioactive disintegration
✓
Answer
Correct option: B.
Changing in atomic energy level
b
For $x-$ Rays
For $x-$ Rays
$\lambda=\frac{h c }{\Delta E }$
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 current of $2.0$ ampere passes through a cell of $e.m.f$. $1.5\, volts$ having internal resistance of $0.15\, ohm$. The potential difference measured, in $volts$, across both the ends of the cell will be
→Einstein got Nobel prize on which of the following works
If ${\lambda _p}$ and ${\lambda _\alpha }$ be the de-Broglie's wavelengths associated with protons and $\alpha - $ particles of equal kinetic energies, then
→Which of the following quantities are always positive in a simple harmonic motion?
Three capacitors each of capacitance $C$ and of breakdown voltage $V$ are joined in series. The capacitance and breakdown voltage of the combination will be
→Consider three converging lenses $L_1, L_2$ and $L_3$ having identical geometrical construction. The index of refraction of $L_1$ and $L_2$ are $\mu_1$ and $\mu_2$ respectively. The upper half of the lens $L_3$ has a refractive index $\mu_1$ and the lower half has $\mu_2$. A point object $O$ is imaged at $O_1$ by the lens $L_1$ and at $O_2$ by the lens $L_2$ placed in same position. If $L_3$ is placed at the same place:
→“On flowing current in a conducting wire the magnetic field produces around it.” It is a law of
The magnetic susceptibility is negative for:
A steel wire has a magnetic moment $M.$ What will be its magnetic moment if it is bent into a semi-circular arc ?
→The magnetic field of a plane electromagnetic Wave is $\overrightarrow{ B }=3 \times 10^{-8} \sin [200 \pi( y + ct )] \hat{ i }\, T$ Where $c=3 \times 10^{8} \,ms ^{-1}$ is the speed of light. The corresponding electric field is
→