1
JEE Main 2022 (Online) 29th July Evening Shift
+4
-1

An $$\alpha$$ particle and a proton are accelerated from rest through the same potential difference. The ratio of linear momenta acquired by above two particles will be:

A
$$\sqrt2$$ : 1
B
2$$\sqrt2$$ : 1
C
4$$\sqrt2$$ : 1
D
8 : 1
2
JEE Main 2022 (Online) 29th July Evening Shift
+4
-1

(A) Volume of the nucleus is directly proportional to the mass number.

(B) Volume of the nucleus is independent of mass number.

(C) Density of the nucleus is directly proportional to the mass number.

(D) Density of the nucleus is directly proportional to the cube root of the mass number.

(E) Density of the nucleus is independent of the mass number.

Choose the correct option from the following options.

A
(A) and (D) only.
B
(A) and (E) only.
C
(B) and (E) only.
D
(A) and (C) only.
3
JEE Main 2022 (Online) 29th July Morning Shift
+4
-1

Match List - I with List - II :

List - I List - II
(a) UV rays (i) Diagnostic tool in medicine
(b) X-rays (ii) Water purification
(d) Infrared wave (iv) Improving visibility in foggy days

Choose the correct answer from the options given below :

A
(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
B
(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
C
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
D
(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
4
JEE Main 2022 (Online) 29th July Morning Shift
+4
-1

Find the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its (i) second permitted energy level to the first level, and (ii) the highest permitted energy level to the first permitted level.

A
3 : 4
B
4 : 3
C
1 : 4
D
4 : 1
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