Top 10 Electrostatics PYQs for CUET 2024–25 | Must-Solve Questions with Solutions

Top 10 Electrostatics PYQs for CUET 2024–25 | Must-Solve Questions with Solutions

Q1. Two point charges A and B, having +Q and -Q respectively are placed at certain distance apart and forcing acting between them is F. If 25% charge of A is transferred to B then the force between the two charges.

(a)4F/3
(b)F
(c)9F/16
(d)16F/9f

Ans.(c)

Solution of electrostatics problem showing calculation of new force after transferring 25 percent charge from A to B

Q2.Two positive ions, each carrying a charge q, are separated by a distance d, if F is the force of repulsion between the ions the number of electrons missing from each ion will be ( e being the charge on an electron ) .

(a)4πEoFd²/e²
(b)√4πEoFe²/√d²
(c)√4πEoFd²/√e²
(d)4πEoFd²/q²

Ans.(c)

Solution of electrostatics question showing calculation of number of missing electrons from force between two ions

Q3.A charge q is placed at the centre of the line joining two equal charges Q.The system of the three charges will be in equilibrium if q is equal to.

(a)-Q/4
(b)Q/4
(c)-Q/2
(d)Q/2

Ans.(a)

Solution of physics problem showing equilibrium condition between three charges placed in a straight line

Q4.

Ans. (a)

Q5.

Ans. (c)

Q6.A particle of mass m and charge q is placed at rest in uniform electric field E and then released. The kinetic energy attained by the particle after moving a distance y.

(a)qEy
(b)qE²y
(c)qEy²
(d)q²Ey

Ans.(a)

Solution of physics problem showing calculation of kinetic energy of a charged particle in a uniform electric field

Q7. An electric dipole is placed at an angle of 30° with an electric field intensity 2×10⁵ N/C.It experiences a torque equal to 4 N m. The Charge on the dipole, if the dipole length is 2cm, is.

a) 8 mC
(b) 2 mC
(c) 5 mC
(d) 7 μC

Ans.(b)

Solution of physics question calculating the charge on an electric dipole using torque and electric field data

Q8. A spherical conductor with a radius of 10 cm has a charge of 3.2x10^7 C distributed uniformly. What is the magnitude of the electric field at a point 15 cm from the center of the sphere? (k=9x10^9 Nm^2/C^2)

(a) 1.28 x 10^7 N/C
(b) 1.28 x 10^5 N/C
(c) 1.28 x 10^6 N/C
(d) 1.28 x 10^7 N/C

Ans.(b)

Solution of physics question finding electric field at a point outside a spherical conductor using E = kQ/r²

Q9. Electric field at centre 0 of semicircle of radius a having linear charge density λ given as.

(a)2 λ/Eoa
(b) λπ/Eoa
(c) λ/2πEoa
(d) λ/πEoa

Ans.(c)

Solution of physics problem calculating electric field at the center of a uniformly charged semicircle using E = (2kλ/r) sin(α/2)

Q10. Two parallel infinite line charges with linear charge densities of +λC/m and -λC/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges?

(a)2 λ/EoR
(b) 3 λ/EoR
(c) zero
(d) λ/πEoR

Ans. (d)

Solution of electric field at the midpoint between two infinite line charges with opposite linear charge densities +λ and -λ separated by distance 2R