Electrostatics MCQ Class 12. We covered all the Electrostatics MCQ Class 12 in this post for free so that you can practice well for the exam.
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MCQ on Electrostatics for NEET Students
Assertion: Charge is a scalar quantity. Reason: Charge is invariant under rotation as well as for different frames of reference during relative motion.
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is True.
Option b – The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
512 small drops of mercury, each of radius r and charge q, coalesce to form a big drop. The ratio of the surface density of charge of the big drop with that of each small drop is
(A) 512 : 1
(B) 1 : 8
(C) 1 : 512
(D) 8 : 1
Option d – 8 : 1
Three equal and similar charges of magnitude q are placed at (0, – a, 0), (0, 0, 0), and (0, + a, 0). What is the nature of the equilibrium of the charge at the origin?
(A) Stable when moved along the Y-axis.
(B) Stable when moved along Z-axis.
(C) Stable when moved along the X-axis.
(D) Stable when moved along XZ plane.
Option a – Stable when moved along the Y-axis.
Charges of +2 µC are placed at the four corners A, B, C, and D of a square of side 1 m. The magnitude of the force on the charge at B will be
(A) 0.04 N
(B) 0.07 N
(C) 0.14 N
(D) 0.12 N
Option b – 0.07 N
Three-point charges are placed at the corners of an equilateral triangle. Assuming only electrostatic forces act on charges choose the correct statement.
(A) The system will be in equilibrium if the charges have the same magnitude but not all have the same sign.
(B) The system will be in equilibrium if the charges have different magnitudes and have the same sign.
(C) The system will be in equilibrium if the charges rotate about the center of the triangle.
(D) The system can never be in equilibrium.
Option d – The system can never be in equilibrium.
The electric field strength at a distance x from a is E. What will be the electric field charge Q strength if the distance of the observation point is increased by 2x?
(A) E/2
(B) E/3
(C) E/4
(D) E/9
Option d – E/9
A circular plate of radius 10 cm has a surface charge density of 6 μC/m². If a charge of magnitude 3 µC is placed at a distance of 100 cm from the plate, then the force experienced by the charge will be
(A) 5 mN
(B) 2.5 N
(C) 6 N
(D) 2 mN
Option a – 5 mN
Assertion: At the macroscopic level, the charge loses its quantized nature and appears to be continuous. Reason: There are approximately 10¹⁹ electrons in 1 C of charge.
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is True.
Option a – The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
We covered all the electrostatics MCQ class 12 above in this post for free so that you can practice well for the exam.
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