Match List I with List II
| List I (Physical quantity) | List II (SI unit) |
| A. Self-Inductance | I. Weber |
| B. Magnetic flux | II. Volt |
| C. Impedance | III. Henry |
| D. Induced emf | IV. Ohm |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-III, B-I, C-IV, D-II
Each quantity is matched with its SI unit from its defining relation.
A. Self-Inductance — this matches III. Henry. From \( \Phi = LI \), \( L \) is flux per unit current: \( 1\,\mathrm{H} = 1\,\mathrm{Wb\,A^{-1}} \).
B. Magnetic flux — this matches I. Weber. From \( \Phi = BA \): \( 1\,\mathrm{Wb} = 1\,\mathrm{T\,m^{2}} \).
C. Impedance — this matches IV. Ohm. Impedance is the effective opposition of an ac circuit, \( Z = V/I \), measured like resistance.
D. Induced emf — this matches II. Volt. An emf is work done per unit charge, \( \varepsilon = -d\Phi/dt \), so \( 1\,\mathrm{Wb\,s^{-1}} = 1\,\mathrm{V} \).
NCERT (2026-27):
Summary – …
