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NEET Exam  >  NEET Test  >  NCERT Based Tests  >  Test: Coulomb's Law (NCERT) - NEET MCQ

Coulomb's Law (NCERT) - Free MCQ Practice Test with solutions, NEET NCERT


MCQ Practice Test & Solutions: Test: Coulomb's Law (NCERT) (10 Questions)

You can prepare effectively for NEET NCERT Based Tests for NEET with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Coulomb's Law (NCERT)". These 10 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 10 minutes
  • - Number of Questions: 10

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Test: Coulomb's Law (NCERT) - Question 1
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The constant k in Coulomb's law depends on

Detailed Solution: Question 1

The value of k = (1/4πε0) = 8.854 x 10-12 C2 N-1 m-2 where ε0 is permittivity of free space.

Test: Coulomb's Law (NCERT) - Question 2
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Which of the following statement is not a similarity between electrostatic and gravitational forces?

Detailed Solution: Question 2

Electrostatic forces are both attractive and repulsive depending upon the type of charge, but gravitational forces is always attractive.

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Test: Coulomb's Law (NCERT) - Question 3
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SI unit of permittivity of free space is

Test: Coulomb's Law (NCERT) - Question 4
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The force between two small charged spheres having charges of 1 x 10-7 C and 2 x 10-7 C placed 20 cm apart in air is

Detailed Solution: Question 4

Test: Coulomb's Law (NCERT) - Question 5
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The nucleus of helium atom contains two proton that are separated by distance 3.0 x 10-15 m. The magnitude of the electrostatic force that each proton exerts on the other is

Detailed Solution: Question 5

Charge of proton is qP = 1.6 x 10-19 C

Distance between the protons is, r = 3 x 10-15m
The magnitude of electrostatic force between protons is 

Test: Coulomb's Law (NCERT) - Question 6
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Two insulated charged metallic spheres P and Q have their centres separated by a distance of 60 cm. The radii of P and Q are negligible compared to the distance of separation. The mutual force of electrostatic repulsion if the charge on each is 3.2 x 10-7 C is

Detailed Solution: Question 6

Here, q1 = q2 = 3.2 x 10-7 C, r = 60cm = 0.6 m
Electrostatic force,

Test: Coulomb's Law (NCERT) - Question 7
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Two point charges of +3 μC and +4 μC repel each other with a force of 10 N. If each is given an additional charge of -6 μC, the new force is

Detailed Solution: Question 7

The force between two charges q1 and q2 at a distance r is given by Coulomb's law:

F = k*q1*q2/r^2

where k is Coulomb's constant (9*10^9 N*m^2/C^2).

Given that F = 10 N, q1 = 3 μC = 3*10^-6 C, and q2 = 4 μC = 4*10^-6 C, we can solve for r^2:

10 = 9*10^9 * 3*10^-6 * 4*10^-6 / r^2
r^2 = 9*10^9 * 3*10^-6 * 4*10^-6 / 10
r^2 = 1.08*10^-2 m^2

Now, if each charge is given an additional -6 μC, the new charges are q1' = -3 μC = -3*10^-6 C and q2' = -2 μC = -2*10^-6 C. The new force F' is:

F' = k*q1'*q2'/r^2
F' = 9*10^9 * -3*10^-6 * -2*10^-6 / 1.08*10^-2
F' = 5 N

So, the new force is 5N. Hence, option

Test: Coulomb's Law (NCERT) - Question 8
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The ratio of magnitude of electrostatic force and gravitational force for an electron and proton is

Detailed Solution: Question 8

Here, for an electron and a proton 

Test: Coulomb's Law (NCERT) - Question 9
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The electrostatic attracting force on a small sphere of charge 0.2μC due to another small sphere of charge -0.4μC in air is 0.4N. The distance between the two spheres is

Detailed Solution: Question 9

Here, q1 = 0.2 μC = 0.2 x 10-6 C
q2 = 0.4 μC = -0.4 x 10-6 C, F = -0.4 N
As F = 

= 1.8 x 10-3
∴ r = (1.8 x 10-3)1/2 = 0.0424 m = 42.4 x 10-3 m

Test: Coulomb's Law (NCERT) - Question 10
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Under the action of a given coulombic force the acceleration of an electron is 2.5 x 1022 ms-2. Then the magnitude of the acceleration of a proton under the action of same force is nearly

Detailed Solution: Question 10

The acceleration due to given coulombic force F is 
a = (F/m) or a ∝ (1/m) ...(1)
∴  where mc and mp are masses of electron and proton respectively

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About this NEET Practice Test

This test contains 10 MCQs on Coulomb's Law (NCERT) with detailed solutions for each question. It is part of the NCERT Based Tests for NEET course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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