1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The latent heat of vaporisation of water is $$2240 \mathrm{~J}$$. If the work done in the process of vaporisation of $$1 \mathrm{~g}$$ is $$168 \mathrm{~J}$$, the increase in internal energy is

A
1408 J
B
2072 J
C
2208 J
D
2408 J
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A particle of mass $$2 \mathrm{mg}$$ has the same wavelength as a neutron moving with a velocity of $$3 \times 10^5 \mathrm{~ms}^{-1}$$. The velocity of the particle is (mass of neutron is $$1.67 \times 10^{-27} \mathrm{Kg}$$)

A
$$2.5 \times 10^{-16} \mathrm{~ms}^{-1}$$
B
$$1.5 \times 10^{-13} \mathrm{~ms}^{-1}$$
C
$$2.5 \times 10^{-13} \mathrm{~ms}^{-1}$$
D
$$1.5 \times 10^{-16} \mathrm{~ms}^{-1}$$
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two narrow parallel slits illuminated by a coherent monochromatic light produces an interference pattern on a screen placed at a distance $$\mathrm{D}$$ from the slits. The separation between the dark lines of the interference pattern can be increased by

A
decreasing the distance between the screen and the slits
B
increasing the distance between the slits
C
using monochromatic light of a longer wavelength
D
using monochromatic light of higher frequency
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Three point charges are located on a circular arc at $$\mathrm{A}, \mathrm{B}$$ and $$\mathrm{C}$$ as shown in the figure below. The total electric field at the centre of the $$\operatorname{arc}(\mathrm{C})$$ is

COMEDK 2024 Evening Shift Physics - Electrostatics Question 1 English

A
$$15000 \mathrm{~NC}^{-1}$$
B
$$10000 \mathrm{~N} \mathrm{C}^{-1}$$
C
$$20000 \mathrm{~NC}^{-1}$$
D
$$5000 \mathrm{~NC}^{-1}$$
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