Student Login

Home›Chapters›Electrostatics PYQs›Electric Charge & Coulomb's Law›Question 29

MHT CET 2024 (15 May, Shift 2) · Electric Charge & Coulomb's Law

Electric Charge & Coulomb's Law question from MHT CET 2024 (15 May, Shift 2)

Q29MHT CET 2024 · 15 MAY · SHIFT 2Medium

Electric Charge & Coulomb's Law

Two point charges $+q_1$ and $q_2$ repel each other with a force of $100\text{ N}.\ q_1$ is increased by $10\%$ and $q_2$ is decreased by $10\%$ . If they are kept at their original positions the change in the force of repulsion between them is

Show answer and solution

Answer: (d)

$F \propto q_1q_2$ at fixed distance.
$F' = (1.1\,q_1)(0.9\,q_2)\,\dfrac{k}{r^2} = 0.99F = 99\text{ N}$
Change $= 99 - 100 = -1\text{ N}$ . So the answer is (d) decreased by 1 N.

Report a mistake

More questions on Electric Charge & Coulomb's Law

Two point charges (A and B) + 4q and -4q are placed along a line separated by a distance…MHT CET 2024 (10 May, Shift 2)
Two identical conducting spheres P and S with charge Q on each, repel each other with a…JEE Main 2024 (6 Apr, Shift 2)
A charge +Q is placed at each of the diagonally opposite corners of a square. A charge -q…MHT CET 2024 (3 May, Shift 2)
Charges 3Q, q and Q are placed along x -axis at positions x = 0, x = 1/3 and x = 1…MHT CET 2024 (11 May, Shift 1)
Two identical charged spheres are suspended by strings of equal lengths. The strings make…JEE Main 2024 (1 Feb, Shift 1)
Two identical charged spheres are suspended by strings of equal lengths. The strings make…JEE Main 2024 (30 Jan, Shift 2)
A thin metallic wire having cross sectional area of 10⁻⁴ m² is used to make a ring of…JEE Main 2024 (27 Jan, Shift 1)
Select the correct statement from the following.MHT CET 2023 (12 May, Shift 2)