1
JEE Main 2023 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The work functions of Aluminium and Gold are $$4.1 ~\mathrm{eV}$$ and and $$5.1 ~\mathrm{eV}$$ respectively. The ratio of the slope of the stopping potential versus frequency plot for Gold to that of Aluminium is

A
1.5
B
1.24
C
1
D
2
2
JEE Main 2023 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A body cools in 7 minutes from $$60^{\circ} \mathrm{C}$$ to $$40^{\circ} \mathrm{C}$$. The temperature of the surrounding is $$10^{\circ} \mathrm{C}$$. The temperature of the body after the next 7 minutes will be:

A
$$34^{\circ} \mathrm{C}$$
B
$$28^{\circ} \mathrm{C}$$
C
$$32^{\circ} \mathrm{C}$$
D
$$30^{\circ} \mathrm{C}$$
3
JEE Main 2023 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A dipole comprises of two charged particles of identical magnitude $$q$$ and opposite in nature. The mass 'm' of the positive charged particle is half of the mass of the negative charged particle. The two charges are separated by a distance '$$l$$'. If the dipole is placed in a uniform electric field '$$\bar{E}$$'; in such a way that dipole axis makes a very small angle with the electric field, '$$\bar{E}$$'. The angular frequency of the oscillations of the dipole when released is given by:

A
$$\sqrt{\frac{3 q E}{2 m l}}$$
B
$$\sqrt{\frac{4 q E}{m l}}$$
C
$$\sqrt{\frac{8 q E}{3 m l}}$$
D
$$\sqrt{\frac{8 q E}{m l}}$$
4
JEE Main 2023 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The ratio of speed of sound in hydrogen gas to the speed of sound in oxygen gas at the same temperature is:

A
$$1: 1$$
B
$$1: 2$$
C
$$1: 4$$
D
$$4: 1$$
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