1
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

10 A current is flowing in two straight parallel wires in the same direction. Force of attraction between them is $$1 \times 10^{-3} \mathrm{~N}$$. If the current is doubled in both the wires the force will be

A
$$1 \times 10^{-3} \mathrm{~N}$$
B
$$2 \times 10^{-3} \mathrm{~N}$$
C
$$4 \times 10^{-3} \mathrm{~N}$$
D
$$0.25 \times 10^{-3} \mathrm{~N}$$
2
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Consider a planet whose density is same as that of the earth but whose radius is three times the radius '$$R$$' of the earth. The acceleration due to gravity '$$\mathrm{g}_{\mathrm{n}}$$' on the surface of planet is $$\mathrm{g}_{\mathrm{n}}=\mathrm{x}$$. $$\mathrm{g}$$ where $$\mathrm{g}$$ is acceleration due to gravity on surface of earth. The value of '$$\mathrm{x}$$' is

A
9
B
3
C
$$\frac{1}{3}$$
D
$$\frac{1}{9}$$
3
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When a certain metal surface is illuminated with light of frequency $$v$$, the stopping potential for photoelectric current is $$\mathrm{V}_0$$. When the same surface is illuminated by light of frequency $$\frac{v}{2}$$, the stopping potential is $$\frac{\mathrm{V}_0}{4}$$, the threshold frequency of photoelectric emission is

A
$$\frac{v}{6}$$
B
$$\frac{v}{3}$$
C
$$\frac{2 v}{3}$$
D
$$\frac{4 v}{3}$$
4
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the length of an open organ pipe is $$33.3 \mathrm{~cm}$$, then the frequency of fifth overtone is [Neglect end correction, velocity of sound $$=333 \mathrm{~m} / \mathrm{s}$$ ]

A
$$3500 \mathrm{~Hz}$$
B
$$3000 \mathrm{~Hz}$$
C
$$2500 \mathrm{~Hz}$$
D
$$2000 \mathrm{~Hz}$$
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