JEE Main 2022 (Online) 27th June Morning Shift | Atoms and Nuclei Question 54 | Physics | JEE Main - ExamSIDE.com

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1

JEE Main 2022 (Online) 27th June Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List-I with List-II :

	List - I		List - II
(a)	Ultraviolet rays	(i)	Study crystal structure
(b)	Microwaves	(ii)	Greenhouse effect
(c)	Infrared rays	(iii)	Sterilizing surgical instrument
(d)	X-rays	(iv)	Radar system

Choose the correct answer from the options given below :

A

(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

B

(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)

C

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

D

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

2

JEE Main 2022 (Online) 27th June Morning Shift

MCQ (Single Correct Answer)

+4

-1

An $$\alpha$$ particle and a carbon 12 atom has same kinetic energy K. The ratio of their de-Broglie wavelengths $$({\lambda _\alpha }:{\lambda _{C12}})$$ is :

A

$$1:\sqrt 3 $$

B

$$\sqrt 3 :1$$

C

$$3:1$$

D

$$2:\sqrt 3 $$

3

JEE Main 2022 (Online) 27th June Morning Shift

MCQ (Single Correct Answer)

+4

-1

A hydrogen atom in its ground state absorbs 10.2 eV of energy. The angular momentum of electron of the hydrogen atom will increase by the value of :

(Given, Planck's constant = 6.6 $$\times$$ 10^$$-$$34 Js).

A

2.10 $$\times$$ 10^$$-$$34 Js

B

1.05 $$\times$$ 10^$$-$$34 Js

C

3.15 $$\times$$ 10^$$-$$34 Js

D

4.2 $$\times$$ 10^$$-$$34 Js

4

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

Which is the correct ascending order of wavelengths?

A

$$\lambda$$_visible < $$\lambda$$_X-ray < $$\lambda$$_gamma-ray < $$\lambda$$_microwave

B

$$\lambda$$_gamma-ray < $$\lambda$$_X-ray < $$\lambda$$_visible < $$\lambda$$_microwave

C

$$\lambda$$_X-ray < $$\lambda$$_gamma-ray < $$\lambda$$_visible < $$\lambda$$_microwave

D

$$\lambda$$_microwave < $$\lambda$$_visible < $$\lambda$$_gamma-ray < $$\lambda$$_X-ray

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