Electrostatics Practice Questions
NEET · Physics · 1558 free MCQs with instant results and detailed explanations.
1558
Total
362
Easy
688
Medium
508
Hard
Start Practicing Electrostatics
Take a timed quiz or customize your practice session
Topics in Electrostatics
Electric Field
267
Gauss's Theorem
255
Capacitance
256
Dielectrics
274
Coulomb's Law
253
Potential
253
Sample Questions from Electrostatics
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the force between two point charges of +1 ยตC and -1 ยตC separated by a distance of 0.1 m in air?
A.
9 ร 10โน N
B.
1 ร 10โปโถ N
C.
9 ร 10โปยณ N
D.
1 ร 10โน N
Show Answer & Explanation
Correct Answer: A
According to Coulomb's law, F = k * |qโ * qโ| / rยฒ. Here, k = 9 ร 10โน Nmยฒ/Cยฒ, qโ = 1 ร 10โปโถ C, qโ = -1 ร 10โปโถ C, and r = 0.1 m. Thus, F = 9 ร 10โน * (1 ร 10โปโถ * 1 ร 10โปโถ) / (0.1)ยฒ = 9 ร 10โน N.
Q2
Easy
Two small charges of +5 ยตC and +10 ยตC are placed 0.2 m apart. What is the magnitude of the electrostatic force between them?
A.
1.125 N
B.
0.75 N
C.
0.5 N
D.
2.25 N
Show Answer & Explanation
Correct Answer: A
Using Coulomb's law, F = k * |qโ * qโ| / rยฒ = 9 ร 10โน * |5 ร 10โปโถ * 10 ร 10โปโถ| / (0.2)ยฒ = 1.125 N.
Q3
Easy
If the distance between two charges is halved, what happens to the electrostatic force between them?
A.
It doubles
B.
It remains the same
C.
It quadruples
D.
It halves
Show Answer & Explanation
Correct Answer: C
According to Coulomb's law, if the distance r is halved, the force F becomes F = k * |qโ * qโ| / (r/2)ยฒ, resulting in a quadruple increase in force.
Q4
Medium
Two point charges, +3 ฮผC and -3 ฮผC, are placed 1 m apart in a vacuum. What is the magnitude of the force experienced by each charge?
A.
8.99 N
B.
0.00899 N
C.
0.899 N
D.
0.0899 N
Show Answer & Explanation
Correct Answer: A
Using Coulomb's Law, F = k * |q1 * q2| / rยฒ. Here, k = 9 ร 10^9 N mยฒ/Cยฒ, q1 = 3 ร 10^-6 C, q2 = -3 ร 10^-6 C, and r = 1 m. Therefore, F = 9 ร 10^9 * (3 ร 10^-6 * 3 ร 10^-6) / 1ยฒ = 8.99 N.
Q5
Medium
If the distance between two charges is doubled, what happens to the electrostatic force between them?
A.
It doubles
B.
It becomes half
C.
It is reduced to a quarter
D.
It remains unchanged
Show Answer & Explanation
Correct Answer: C
According to Coulomb's Law, the force is inversely proportional to the square of the distance. Hence, if the distance is doubled (r becomes 2r), the force becomes F / (2ยฒ) = F / 4.
Q6
Medium
What will be the net electrostatic force acting on a charge of +4 ฮผC placed at the origin due to two charges, +2 ฮผC at (2,0) m and -2 ฮผC at (0,2) m?
A.
2 N acting towards the charge at (0,2)
B.
2 N acting towards the charge at (2,0)
C.
1 N acting diagonally
D.
0 N, net force is zero
Show Answer & Explanation
Correct Answer: A
The force due to +2 ฮผC at (2,0) is repulsive (F1 = k * |q1 * q2|/rยฒ towards right), and the force due to -2 ฮผC at (0,2) is attractive (F2 = k * |q1 * q2|/rยฒ towards the charge). Calculating these forces shows a net force of 2 N towards (0,2).
Q7
Medium
Two charges, +5 ฮผC and +10 ฮผC, are separated by a distance of 0.5 m. What is the value of the electrostatic force between them?
A.
180 N
B.
360 N
C.
720 N
D.
90 N
Show Answer & Explanation
Correct Answer: B
Using Coulomb's Law: F = k * |q1 * q2| / rยฒ = (9 ร 10^9) * (5 ร 10^-6 * 10 ร 10^-6) / (0.5)ยฒ = 360 N.
Q8
Hard
Two charges, +q and -q, are placed at a distance d apart. What is the force experienced by a charge Q located midway between them?
A.
Zero
B.
Qq/d^2
C.
2Qq/d^2
D.
Qq/(2d^2)
Show Answer & Explanation
Correct Answer: A
The forces exerted by +q and -q on charge Q are equal in magnitude and opposite in direction, resulting in a net force of zero.
Q9
Hard
If the distance between two point charges is halved, how does the electrostatic force between them change?
A.
It remains the same
B.
It is halved
C.
It doubles
D.
It quadruples
Show Answer & Explanation
Correct Answer: D
According to Coulomb's Law, the force is inversely proportional to the square of the distance; halving the distance increases the force by a factor of 4.
Q10
Hard
Three charges are arranged in a straight line: +2q, -q, and +2q. If the distance between each charge is d, what is the net force acting on the charge -q?
A.
0
B.
k * 3q^2 / d^2
C.
k * q^2 / d^2
D.
k * q^2 / (2d^2)
Show Answer & Explanation
Correct Answer: B
The charge -q experiences attractive forces from both +2q charges, resulting in a net force directed towards one of the +2q charges.
Showing 10 of 1558 questions. Start a quiz to practice all questions with scoring and timer.
Practice All 1558 Questions →Other NEET Subjects
Electrostatics โ NEET Physics Practice Questions Online
This page contains 1558 practice MCQs for the chapter Electrostatics in NEET Physics. The questions are organized by difficulty โ 362 easy, 688 medium, 508 hard โ so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 6 topics, giving you comprehensive coverage of the entire chapter.