Short notes
Objective questions (Answers are given below)
- Relative permeability of vacuum is
(a) 4π × 10−7 H/m (b) 1 H/m
(c) 1 (d) 1/4 π - Unit of magnetic flux is
(a) weber (b) ampere-turn
(c) tesla (d) coulomb - Point out the WRONG statement.
The magnetising force at the centre of a
circular coil varies.
(a) directly as the number of its turns
(b) directly as the current
( c) directly as its radius
(d) inversely as its radius
1.c 2. a 3. a