1
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A photoelectric surface is illuminated successively by monochromatic light of wavelength ' $\lambda$ ' and $\left(\frac{\lambda}{2}\right)$. If the maximum kinetic energy of the emitted photoelectrons in the first case is one-fourth that in the second case, the work function of the surface of the material is ( $\mathrm{c}=$ speed of light, $\mathrm{h}=$ Planck's constant$)$

A
$\frac{2 \mathrm{hc}}{\lambda}$
B
$\frac{\mathrm{hc}}{\lambda}$
C
$\frac{2 h \mathrm{c}}{3 \lambda}$
D
$\frac{\mathrm{hc}}{3 \lambda}$
2
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The magnitude of magnetic field at point 'O' in the following figure will be

MHT CET 2024 10th May Evening Shift Physics - Moving Charges and Magnetism Question 27 English

A
$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}\left(\frac{2}{\pi}+2\right)$
B
$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}\left(\frac{2}{\pi}-2\right)$
C
$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}\left(2+\frac{\pi}{2}\right)$
D
$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}\left(2-\frac{\pi}{2}\right)$
3
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Radius of first orbit in H -atom is ' $a_0$ ' Then, de-Broglie wavelength of electron in the third orbit is

A
$3 \pi \mathrm{a}_0$
B
$6 \pi \mathrm{a}_0$
C
$9 \pi \mathrm{a}_0$
D
$12 \pi \mathrm{a}_0$
4
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

For a gas, $\frac{\mathrm{R}}{\mathrm{C}_{\mathrm{v}}}=0.4$ where R is the universal gas constant and ' $\mathrm{C}_{\mathrm{V}}$ ' is molar specific heat at constant volume. The gas is made up of molecules which are

A
rigid diatomic.
B
monoatomic.
C
non-rigid diatomic.
D
polyatomic.
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