1
MHT CET 2024 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two identical photocathodes receive light of frequencies ' $\mathrm{n}_1$ ' and ' $\mathrm{n}_2$ '. If the velocities of the emitted photoelectrons of mass ' $m$ ' are ' $\mathrm{V}_1$ ' and ' V , respectively, then ( $\mathrm{h}=$ Planck's constant )

A
$\mathrm{V}_1+\mathrm{V}_2=\left[\frac{2 \mathrm{~h}}{\mathrm{~m}}\left(\mathrm{n}_1+\mathrm{n}_2\right)\right]^{1 / 2}$
B
$\mathrm{V}_1-\mathrm{V}_2=\left[\frac{2 \mathrm{~h}}{\mathrm{~m}}\left(\mathrm{n}_1-\mathrm{n}_2\right)\right]^{1 / 2}$
C
$\mathrm{V}_1^2+\mathrm{V}_2^2=\frac{2 \mathrm{~h}}{\mathrm{~m}}\left(\mathrm{n}_1+\mathrm{n}_2\right)$
D
$\mathrm{V}_1^2-\mathrm{V}_2^2=\frac{2 \mathrm{~h}}{\mathrm{~m}}\left(\mathrm{n}_1-\mathrm{n}_2\right)$
2
MHT CET 2024 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The temperature of a gas is $-80^{\circ} \mathrm{C}$. To what temperature the gas should be heated so that the r.m.s. speed is increased by 2 times?

A
$499^{\circ} \mathrm{C}$
B
$772^{\circ} \mathrm{C}$
C
$1464^{\circ} \mathrm{C}$
D
$1737^{\circ} \mathrm{C}$
3
MHT CET 2024 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two wavelength 590 nm and 596 nm of sodium light are used one after other, to study the diffraction taking place at a single slit of aperture 2.4 mm . The distance between the slit and screen is 2 m . The separation between the positions of first secondary maximum of the diffraction pattern obtained in the two cases is

A
$7.5 \times 10^{-6} \mathrm{~m}$
B
$7.5 \times 10^{-9} \mathrm{~m}$
C
$ 2.5 \times 10^{-6} \mathrm{~m}$
D
$5.0 \times 10^{-6} \mathrm{~m}$
4
MHT CET 2024 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

For the diagram shown, the resistance between points A and B when the ideal diode ' $D$ ' is forward biased is ' $R_1$ ' and that when reverse biased is ' $R_2$ '. The ratio $\frac{R_1}{R_2}$ is

MHT CET 2024 9th May Morning Shift Physics - Semiconductor Devices and Logic Gates Question 33 English

A
$\frac{2}{3}$
B
$\frac{2}{5}$
C
$\frac{3}{2}$
D
$\frac{5}{2}$
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