JEE Main 2025 (Online) 28th January Evening Shift | Units & Measurements Question 17 | Physics

1

JEE Main 2025 (Online) 28th January Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List - I with List - II.

List - I	List - II
(A) Angular Impulse	(I) M⁰ L² T^-2
(B) Latent Heat	(II) M L² T^-3 A^-1
(C) Electrical resistivity	(III) M L² T^-1
(D) Electromotive force	(IV) M L³ T^-3 A^-2

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

2

JEE Main 2025 (Online) 24th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

For an experimental expression $y=\frac{32.3 \times 1125}{27.4}$, where all the digits are significant. Then to report the value of $y$ we should write

A

$y=1326.186$

B

$y=1326.2$

C

$y=1326.19$

D

$y=1330$

3

JEE Main 2025 (Online) 23rd January Evening Shift

MCQ (Single Correct Answer)

+4

-1

The energy of a system is given as $\mathrm{E}(\mathrm{t})=\alpha^3 \mathrm{e}^{-\beta t}$, where t is the time and $\beta=0.3 \mathrm{~s}^{-1}$. The errors in the measurement of $\alpha$ and $t$ are $1.2 \%$ and $1.6 \%$, respectively. At $t=5 \mathrm{~s}$, maximum percentage error in the energy is :

A

$6 \%$

B

$11.6 \%$

C

$4 \%$

D

$8.4 \%$

4

JEE Main 2025 (Online) 23rd January Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List - I with List - II

	List - I		List - II
(A)	Permeability of free space	(I)	$\left[\mathrm{M} \mathrm{L}^2 \mathrm{~T}^{-2}\right]$
(B)	Magnetic field	(II)	$\left[\mathrm{M} \mathrm{T}^{-2} \mathrm{~A}^{-1}\right]$
(C)	Magnetic moment	(III)	$\left[\mathrm{M} \mathrm{L} \mathrm{T}^{-2} \mathrm{~A}^{-2}\right]$
(D)	Torsional constant	(IV)	$\left[\mathrm{L}^2 \mathrm{~A}\right]$

Choose the correct answer from the options given below :

A

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

B

$(\mathrm{A})-(\mathrm{I}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{III})$

C

$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{IV})$

D

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