Question

A flat coil, `C`, of `n` turns, area `A` and resistance `R`, is placed in a uniform magnetic field of magnitude `B`. The plane of the coil is initially perpendicular to `B`. The coil,is rotated by an angle `theta` about a diameter and charge of amount `Q` flows through it. Choose the correct alternatives.
A. (a) `theta = 90^(@), Q = (Ban//R)`
B. (b) `theta = 180^(@), Q = (Ban//R)`
C. ( c) `theta = 180^(@), Q = 0`
D. ( d) `theta = 360^(@), Q = 0`

Answer 1

Correct Answer - A::B::D
(a,b,d):
Charge flowing in the circuit `= (Deltaphi)/(R )`
where, `Deltaphi` = change in flux`
`= `phi_(final)` - `phi_(initial)`
and `R` = resistance in the circuit