Other Physics · JEE Main previous year questions

2023 59 questions

1. Q402023 · 25 Jan 2023 · Shift 2
   
   1. A.$\frac{t_P}{100}=\frac{t_Q-180}{150}$
   2. B.$\frac{t_P}{180}=\frac{t_Q-40}{100}$
   3. C.$\frac{t_Q}{150}=\frac{t_P-180}{100}$
   4. D.$\frac{t_Q}{100}=\frac{t_P-30}{150}$
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   Answer: D

2. Q502023 · 25 Jan 2023 · Shift 2

   Match List I with List II $$\begin{array}{llll}& \text{List I}& & \text{List II}\\ \text{A.}& \text{Troposphere}& \text{I.}& \text{Approximate 65-75 km over Earth’s surface}\\ \text{B.}& \text{E-Part of Stratosphere}& \text{II.}& \text{Approximate 300 km over Earth’s surface}\\ \text{C.}& {\mathrm{F}}_2\text{-Part of Thermosphere}& \text{III.}& \text{Approximate 10 km over Earth’s surface}\\ \text{D.}& \text{D-Part of Stratosphere}& \text{IV.}& \text{Approximate 100 km over Earth’s surface}\end{array}$$ Choose the correct answer from the options given below :

   1. A.A-III, B-IV, C-II, D-I
   2. B.A-III, B-II, C-I, D-IV
   3. C.A-I, B-IV, C-III, D-II
   4. D.A-I, B-II, C-IV, D-III
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   Answer: A

3. Q352023 · 24 Jan 2023 · Shift 1

   The weight of a body at the surface of earth is $18\mathrm{N}$. The weight of the body at an altitude of $3200\mathrm{km}$ above the earth's surface is (given, radius of earth ${\mathrm{R}}_{\mathrm{e}}=6400\mathrm{km}$) :

   1. A.$9.8\mathrm{N}$
   2. B.$4.9\mathrm{N}$
   3. C.$19.6\mathrm{N}$
   4. D.$8\mathrm{N}$
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   Answer: D

4. Q432023 · 24 Jan 2023 · Shift 1

   A travelling wave is described by the equation $y(x,t)=[0.05\sin (8x-4t)]\mathrm{m}$ The velocity of the wave is : [all the quantities are in SI unit]

   1. A.$4\mathrm{m}{\mathrm{s}}^{-1}$
   2. B.$2\mathrm{m}{\mathrm{s}}^{-1}$
   3. C.$8\mathrm{m}{\mathrm{s}}^{-1}$
   4. D.$0.5\mathrm{m}{\mathrm{s}}^{-1}$
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   Answer: D

5. Q442023 · 24 Jan 2023 · Shift 1

   The maximum vertical height to which a man can throw a ball is 136 m. The maximum horizontal distance upto which he can throw the same ball is :

   1. A.136 m
   2. B.272 m
   3. C.68 m
   4. D.192 m
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   Answer: B

6. Q472023 · 24 Jan 2023 · Shift 1

   Given below are two statements : Statement I : An elevator can go up or down with uniform speed when its weight is balanced with the tension of its cable. Statement II : Force exerted by the floor of an elevator on the foot of a person standing on it is more than his/her weight when the elevator goes down with increasing speed. In the light of the above statements, choose the correct answer from the options given below :

   1. A.Both Statement I and Statement II are false
   2. B.Both Statement I and Statement II are true
   3. C.Statement I is false but Statement II is true
   4. D.Statement I is true but Statement II is false
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   Answer: D

7. Q532023 · 24 Jan 2023 · Shift 1· Numerical answer

   Vectors $a\hat{i}+b\hat{j}+\hat{k}$ and $2\hat{i}-3\hat{j}+4\hat{k}$ are perpendicular to each other when $3a+2b=7$, the ratio of $a$ to $b$ is $\frac{x}{2}$. The value of $x$ is ____.

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   Answer: 1

8. Q452023 · 24 Jan 2023 · Shift 2

   Given below are two statements: Statement I : Acceleration due to earth's gravity decreases as you go 'up' or 'down' from earth's surface. Statement II : Acceleration due to earth's gravity is same at a height 'h' and depth 'd' from earth's surface, if h = d. In the light of above statements, choose the most appropriate answer from the options given below

   1. A.Statement I is correct but statement II is incorrect
   2. B.Both Statement I and II are correct
   3. C.Statement I is incorrect but statement II is correct
   4. D.Both Statement I and Statement II are incorrect
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   Answer: A

9. Q482023 · 24 Jan 2023 · Shift 2

   If two vectors $\vec{P}=\hat{i}+2m\hat{j}+m\hat{k}$ and $\vec{Q}=4\hat{i}-2\hat{j}+m\hat{k}$ are perpendicular to each other. Then, the value of m will be :

   1. A.$-1$
   2. B.3
   3. C.1
   4. D.2
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   Answer: D