JEE (Main)-2025 Physics Quiz

Find the dimensions of B/μ0

• [AL]

• [AL–1]

• [MAL]

• [MALT–1]

Solid sphere of mass M, radius R exerts force F on a point mass. Now a concentric spherical mass 7M is removed. What is new force?

• 7F

• 6/7F

• 5/7F

• 3/7F

Find out equivalent capacitance for the situation shown in figure.

• Ceq = (K1 + K2 + K3)/(K1K2K3)

• Ceq = (K1 + K2 + K3)/(K1K2K3)

• Ceq = (K1 + K2 + K3)/(K1K2K3)

• Ceq = (K1 + K2 + K3)/(K1K2K3)

From a sphere of mass M and radius R, a cavity of radius 2R is created. Find the moment of inertia about an axis passing through the centre of sphere and cavity.

• 2/3 MR^2

• 2/3 MR^2

• 2/3 MR^2

• 2/3 MR^2

Find the radius of curvature of the common surface of two bubbles (R1 > R2)

• R = R1 + R2

• R = R1 - R2

• R = R1 - R2

• R = R1 - R2

From the given option, identify the diode connected in forward bias.

• Option 1

• Option 2

• Option 3

• Option 4

Radius of electron in ground state for hydrogen is a0, then radius of electron in He+ ion in 3rd excited state is a. Then a0 is

• 1/2 a0

• 1/4 a0

• 1/16 a0

• 1/8 a0

Ice at –10°C is to be converted into steam at 110°C. Mass of ice is 10–3 kg. What amount of heat is required?

• ΔQ = 730 cal

• ΔQ = 900 cal

• ΔQ = 1210 cal

• ΔQ = 870 cal

A charge of value q is placed at the edge of an imaginary cube of side a as shown in figure. Find the net flux through the cube.

• 0

• 4q/ε0

• 8q/ε0

• 2q/ε0

A closed organ pipe in 9th harmonic resonates with 4th harmonic of open organ pipe [lclosed = 10 cm]. Find length of open organ pipe.

• 15 cm

• 100 cm

• 110 cm

• 80 cm