8 April JEE Main Physics Question Paper OUT with Answer Key 2025 Session 2

1

Find output voltage in the given circuit.

Zero

2

A fractional errors in x, y and z are 0.1, 0.2 and 0.5 respectively. Find maximum fractional error in x ^-2 y ^3/2 z ^-2/5 .

0.7

3

For a nucleus of mass number A and radius R, mass/density p. Then choose the correct option

p is independent of A

4

A convex lens (f = 30 cm) is in contact with concave lens (f = 20 cm). Object is placed on the left side at a distance of 20 cm. Find the image distance.

15 cm

5

There are two charged sphere of radius R and 3R. When the sphere are made to touch each other and then separate, the surface charge density becomes r ₁ and r ₂ respectively. Find r ₁ /r ₂ .

3

6

Given λ = 2nc/m (linear charge density) is for Q wire which is passing m through body diagonal of a closed cube of side length √3 cm. Find flux through the cube.

2.16π

7

A monoatomic gas is stored in a thermally insulated container. The gas is suddenly compressed to (1/8) ^th of its initial volume. Find ratio of final pressure to initial pressure.

32

8

Two balls are projected with same speed at different angles. If maximum height of 1 ^st is 8 times maximum height of 2 ^nd ball. Find the ratio of their time of flight.

2√2 : 1

9

A uniform disc of radius r is rotating about an axis passing through diameter with angular speed 800 rpm. A torque of magnitude 25π Nm is applied on the disc for 40 sec. If final angular speed of disc is 2100 rpm. Find radius of the disc if mass is 1 kg.

20√3/13

10

Water falls from 200 m height. What is increase in temperature when it touches the bottom? (Assume that all the heat goes into same amount of mass which was falling).

10/20 ^O C