JEE Main 2023 (Online) 1st February Evening Shift | Electromagnetic Waves Question 43 | Physics

	List I		List II
A.	Microwaves	I.	Radio active decay of the nucleus
B.	Gamma rays	II.	Rapid acceleration and deceleration of electron in aerials
C.	Radio waves	III.	Inner shell electrons
D.	X-rays	IV.	Klystron valve

Choose the correct answer from the options given below :

A-I, B-III, C-IV, D-II

A-IV, B-III, C-II, D-I

A-IV, B-I, C-II, D-III

A-I, B-II, C-III, D-IV

JEE Main 2023 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

-1

Match List I with List II

LIST I		LIST II
A.	Microwaves	I.	Physiotherapy
B.	UV rays	II.	Treatment of cancer
C.	Infra-red light	III.	Lasik eye surgery
D.	X-ray	IV.	Aircraft navigation

Choose the correct answer from the options given below:

A - IV, B - III, C - I, D - II

A - II, B - IV, C - III, D - I

A - III, B - II, C - I, D - IV

A - IV, B - I, C - II, D - III

JEE Main 2023 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

A point source of $100 \mathrm{~W}$ emits light with $5 \%$ efficiency. At a distance of $5 \mathrm{~m}$ from the source, the intensity produced by the electric field component is:

$\frac{1}{40 \pi} \frac{W}{m^2}$

$\frac{1}{10 \pi} \frac{W}{m^2}$

$\frac{1}{20 \pi} \frac{W}{m^2}$

$\frac{1}{2 \pi} \frac{W}{m^2}$

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