JEE Main 2021 (Online) 24th February Evening Slot | Dual Nature of Radiation Question 60 | Physics

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JEE Main 2021 (Online) 24th February Evening Slot

MCQ (Single Correct Answer)

-1

An X-ray tube is operated at 1.24 million volt. The shortest wavelength of the produced photon will be :

10^$$-$$2 nm

10^$$-$$1 nm

10^$$-$$3 nm

10^$$-$$4 nm

JEE Main 2021 (Online) 24th February Evening Slot

MCQ (Single Correct Answer)

-1

Match List - I with List - II.

	List I		List II
(a)	Source of microwave frequency	(i)	Radioactive decay of nucleus
(b)	Source of infrared frequency	(ii)	Magnetron
(c)	Source of Gamma Rays	(iii)	Inner shell electrons
(d)	Source of X-rays	(iv)	Vibration of atoms and molecules
		(v)	LASER
		(vi)	RC circuit

Choose the correct answer from the options given below :

(a)-(vi), (b)-(v), (c)-(i), (d)-(iv)

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

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

(a)-(vi), (b)-(iv), (c)-(i), (d)-(v)

JEE Main 2021 (Online) 24th February Evening Slot

MCQ (Single Correct Answer)

-1

According to Bohr atom model, in which of the following transitions will the frequency be maximum?

n = 2 to n = 1

n = 3 to n = 2

n = 4 to n = 3

n = 5 to n = 4

JEE Main 2021 (Online) 24th February Morning Slot

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement I : Two photons having equal linear momenta have equal wavelengths.

Statement II : If the wavelength of photon is decreased, then the momentum and energy of a photon will also decrease.

In the light of the above statements, choose the correct answer from the options given below.

Statement I is false but Statement II is true

Both Statement I and Statement II are false

Both Statement I and Statement II are true

Statement I is true but Statement II is false

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