JEE Main 2023 Question Paper (25-Jan-2023) (Shift 2)

Question 1

Match List I with List II List IList II AYoung's Modulus $\left(Y\right)$I$[\mathrm{ML}^{-1} \mathrm{T}^{-2}]$ BCo-efficient of Viscosity $\left(\eta\right)$II$[\mathrm{ML}^{-1} \mathrm{T}^{-1}]$ CPlanck's Constant $\left(h\right)$III$[\mathrm{ML}^2 \mathrm{T}^{-1}]$ DWork Function $\left(\varphi\right)$IV$[\mathrm{ML}^2 \mathrm{T}^{-2}]$ Choose the correct answer from the options given below:

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 2

According to the law of equipartition of energy, the molar specific heat of a diatomic gas at constant volume, where the molecule has one additional vibrational mode, is given by:

Accepted Answer

$ \frac{7}{2} R $

Answer

$ \frac{9}{2} R $

Answer

$\frac{5}{2}R$

Answer

$ \frac{3}{2} R $

Question 3

The light rays from an object have been reflected towards an observer from a standard flat mirror. The image observed by the observer is: A. Real B. Erect C. Smaller in size than the object D. Laterally inverted Choose the most appropriate answer from the options given below:

Accepted Answer

B and D only

Answer

B and C only

Answer

A and D only

Answer

A, C and D only

Question 4

For a moving coil galvanometer, the deflection in the coil is $0.05 \mathrm{rad}$ when a current of $10 \quad \mathrm{mA}$ is passed through it. If the torsional constant of the suspension wire is $4.0 \times 10^{-5} \mathrm{N} \mathrm{m}  \mathrm{rad}^{-1}$, the magnetic field is $0.01 \mathrm{T}$, and the number of turns in the coil is $200$, the area of each turn (in $\mathrm{cm}^2$) is :

Accepted Answer

$1.0$

Answer

$\quad 2.0$

Answer

$\quad 1.5$

Answer

$0.5$

Question 5

The graph between two temperature scales $P$ and $Q$ is shown in the figure. Between the upper fixed point and the lower fixed point, there are $150$ equal divisions of scale $P$ and $100$ divisions on scale $Q$. The relationship for conversion between the two scales is given by:.

Accepted Answer

$ \frac{t_Q}{100} = \frac{t_P - 30}{150} $

Answer

$ \frac{t_{Q}}{150} = \frac{t_{P} - 180}{100} $

Answer

$ \frac{t_{P}}{180} = \frac{t_{Q} - 40}{100} $

Answer

$ \frac{t_{Q}}{100} = \frac{t_{P} - 180}{150} $

	List I		List II
A	Young's Modulus $\left(Y\right)$	I	$[\mathrm{ML}^{-1} \mathrm{T}^{-2}]$
B	Co-efficient of Viscosity $\left(\eta\right)$	II	$[\mathrm{ML}^{-1} \mathrm{T}^{-1}]$
C	Planck's Constant $\left(h\right)$	III	$[\mathrm{ML}^2 \mathrm{T}^{-1}]$
D	Work Function $\left(\varphi\right)$	IV	$[\mathrm{ML}^2 \mathrm{T}^{-2}]$