JEE Main 2024 (Online) 30th January Morning Shift | Units & Measurements Question 29 | Physics

1

JEE Main 2024 (Online) 30th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II.

	List I		List II
(A)	Coefficient of viscosity	(I)	$$\left[\mathrm{M} \mathrm{L}^2 \mathrm{~T}^{-2}\right]$$
(B)	Surface tension	(II)	$$\left[\mathrm{M} \mathrm{L}^2 \mathrm{~T}^{-1}\right]$$
(C)	Angular momentum	(III)	$$\left[\mathrm{M} \mathrm{L}^{-1} \mathrm{~T}^{-1}\right]$$
(D)	Rotational kinetic energy	(IV)	$$\left[\mathrm{M} \mathrm{L}^0 \mathrm{~T}^{-2}\right]$$

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

2

JEE Main 2024 (Online) 29th January Evening Shift

MCQ (Single Correct Answer)

+4

-1

A physical quantity $$Q$$ is found to depend on quantities $$a, b, c$$ by the relation $$Q=\frac{a^4 b^3}{c^2}$$. The percentage error in $$a, b$$ and $$c$$ are $$3 \%, 4 \%$$ and $$5 \%$$ respectively. Then, the percentage error in $$Q$$ is :

A

43%

B

34%

C

66%

D

14%

3

JEE Main 2024 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

The resistance $$R=\frac{V}{I}$$ where $$\mathrm{V}=(200 \pm 5) \mathrm{V}$$ and $$I=(20 \pm 0.2) \mathrm{A}$$, the percentage error in the measurement of $$\mathrm{R}$$ is :

A

5.5%

B

3%

C

7%

D

3.5%

4

JEE Main 2024 (Online) 27th January Evening Shift

MCQ (Single Correct Answer)

+4

-1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : In Vernier calliper if positive zero error exists, then while taking measurements, the reading taken will be more than the actual reading.

Reason (R) : The zero error in Vernier Calliper might have happened due to manufacturing defect or due to rough handling.

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

A

Both (A) and (R) are correct and (R) is the correct explanation of (A)

B

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true