1
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

A light of wavelength $$500 \mathrm{~nm}$$ is incident on a Young's double slit. The distance between slit and screen is $$D=1.8 \mathrm{~m}$$ and distance between slits is $$d=0.4 \mathrm{~mm}$$. If screen moves with a speed of $$4 \mathrm{~m} / \mathrm{s}$$, then with what speed first maxima will move?

A
5 mm/s
B
4 mm/s
C
3 mm/s
D
2 mm/s
2
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

In an isothermal process 2 water drops of radius $$1 \mathrm{~mm}$$ are combined to form a bigger drop. Find the energy change in this process if $$T=0.1 \mathrm{~N} / \mathrm{m}$$.

A
$$1 \mu \mathrm{J}$$
B
$$0.5 \mu \mathrm{J}$$
C
$$0.25 \mu \mathrm{J}$$
D
$$0.75 \mu \mathrm{J}$$
3
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

If temperature of Sun $$=6000 \mathrm{~K}$$, radius of Sun is $$7.2 \times 10^5 \mathrm{~km}$$, radius of Earth $$=6000 \mathrm{~km}$$ and distance between Earth and Sun $$=15 \times 10^7 \mathrm{~km}$$. Find intensity of light on Earth.

A
$$19.2 \times 10^{16}$$
B
$$12.2 \times 10^{16}$$
C
$$18.3 \times 10^{16}$$
D
$$9.2 \times 10^{16}$$
4
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Calculate radiation power for sphere whose temperature is 227$$^\circ$$C, radius 2 m and emissivity 0.8.

A
142.5 kW
B
1500 W
C
1255 W
D
1575 W
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