JEE Main 2023 Question Paper (06-Apr-2023) (Shift 1)

Question 1

A particle is moving with constant speed in a circular path. When the particle turns by an angle $90^\circ,$ the ratio of instantaneous velocity to its average velocity is $\pi : x \sqrt{2}.$ The value of $x$ will be

Accepted Answer

$2$

Answer

$5$

Answer

$1$

Answer

$7$

Question 2

A source supplies heat to a system at the rate of $1000  \mathrm{W}$. If the system performs work at a rate of $200 \mathrm{W}$, the rate at which the internal energy of the system increases is

Accepted Answer

$800 \quad \mathrm{W}$

Answer

$600 \quad \mathrm{W}$

Answer

$500 \quad \mathrm{W}$

Answer

$1200 \quad \mathrm{W}$

Question 3

The number of air molecules per ${\mathrm{cm}}^{3}$ is increased from $3 	imes 10^{19}$ to $12 	imes 10^{19}$. The ratio of collision frequency of air molecules before and after the increase in number respectively is :

Accepted Answer

$0.25$

Answer

$0.75$

Answer

$1.25$

Answer

$0.50$

Question 4

The energy levels of a hydrogen atom are shown below. The transition corresponding to the emission of the shortest wavelength is

Accepted Answer

$D$

Answer

$ A $

Answer

$B$

Answer

$C$

Question 5

The induced emf can be produced in a coil by: A. moving the coil with uniform speed inside a uniform magnetic field B. moving the coil with non-uniform speed inside a uniform magnetic field C. rotating the coil inside the uniform magnetic field D. changing the area of the coil inside the uniform magnetic field Choose the correct answer from the options given below:

Accepted Answer

$C$ and $D$ only

Answer

$B$ and $C$ only

Answer

$A$ and $C$ only

Answer

$B$ and $D$ only