Some magnetic flux is changed from a coil of resitance `10 Omega`. As a result, an induced current is developed it, which varies with time as shown in Fig. 3.213. Find the magnitude of the change in flux through ythe coil in weber.

Explanation

The induced charge is `q = (Delta phi)/(R )`
But. Area of `i-t` curve gives charge
`:. Delta phi = R xx "Area of i-t curve", Delta phi = qR`
`= (1)/(2) xx 4 xx 0.1 xx 10` , `:. Delta phi = 2 wb`