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Class 12 Physics — Chapter 1: Electric Charges and Fields
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 12 Physics, Chapter 1 (Electric Charges and Fields). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
The SI unit of electric charge is:
A.Ampere
B.Coulomb✓ correct
C.Volt
D.Tesla
Why
1 coulomb = 1 ampere × 1 second.
Q2Medium
Electric field due to a point charge q at distance r is:
A.kq/r
B.kq/r²✓ correct
C.kq²/r²
D.kq·r
Why
E = kq/r², where k = 1/(4πε₀).
Q3Hard
Electric field on the axis of an electric dipole at distance r (r ≫ a) is:
A.kp / r³
B.2kp / r³✓ correct
C.kp / r²
D.kp / r
Why
Axial field of a short dipole: E_axial = 2kp/r³ (k = 1/(4πε₀), p = dipole moment).
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