JEE Main 2023 Question Paper (01-Feb-2023) (Shift 1)

Question 1

Match the List I with List II List I List II A Intrinsic Semiconductor I Fermi-level at middle of valence and conduction band B n-type semiconductor II Fermi-level near conduction band C p-type semiconductor III Fermi-level near valence band D Metals IV Fermi-level inside conduction band Choose the correct answer from the options given below:

Accepted Answer

(A) $	o$ II, (B) $	o$ III, (C) $	o$ I, (D) $	o$ IV

Answer

(A) $ 	o $ I, (B) $ 	o $ II, (C) $ 	o $ III, (D) $ 	o $ IV

Answer

(A) $	o$ II, (B) $	o$ I, (C) $	o$ III, (D) $	o$ IV

Answer

(A) $	o$ III, (B) $	o$ I, (C) $	o$ II, (D) $	o$ IV

Question 2

An object moves with speeds $ v_1, \ v_2, \ \text{and} \ v_3 $ along the line segments $ AB, \quad BC, \ \text{and} \ CD $ respectively, as shown in the figure. Given that $ AB = BC $ and $ AD = 3 \, AB $, the average speed of the object will be:

Accepted Answer

$ \frac{3 v_1 v_2 v_3}{v_1 v_2 + v_2 v_3 + v_3 v_1} $

Answer

$ \frac{v_1 + v_2 + v_3}{3} $

Answer

$ \frac{v_1 v_2 v_3}{3 \left( v_1 v_2 + v_2 v_3 + v_3 v_1 \right)} $

Answer

$ \frac{v_1 + v_2 + v_3}{3 v_1 v_2 v_3} $

Question 3

Given below are two statements : Statement-I: Acceleration due to gravity is different at different places on the surface of Earth. Statement-II: Acceleration due to gravity increases as we go down below the Earth's surface. In the light of the above statements, choose the correct answer from the options given below

Accepted Answer

Statement I is true but Statement II is false

Answer

Both Statement I and Statement II are true

Answer

Both Statement I and Statement II are false

Answer

Statement I is false but Statement II is true

Question 4

Match the List-I with List-II. List I List II A AC generator I Presence of both L and C B Transformer II Electromagnetic Induction C Resonance phenomenon to occur III Quality factor D Sharpness of resonance IV Mutual Inductance Choose the correct answer from the options given below:

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 5

Match the List-I with List-II: List I List II A Microwaves I Radioactive 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:

Accepted Answer

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

Answer

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

Answer

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

Answer

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

	List I		List II
A	Intrinsic Semiconductor	I	Fermi-level at middle of valence and conduction band
B	n-type semiconductor	II	Fermi-level near conduction band
C	p-type semiconductor	III	Fermi-level near valence band
D	Metals	IV	Fermi-level inside conduction band

	List I		List II
A	AC generator	I	Presence of both L and C
B	Transformer	II	Electromagnetic Induction
C	Resonance phenomenon to occur	III	Quality factor
D	Sharpness of resonance	IV	Mutual Inductance

	List I		List II
A	Microwaves	I	Radioactive 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