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Some magnetic flux is changed from a coi...

Some magnetic flux is changed from a coil resistance `10Omega`. As a result an induced current developed in it. Which varies with time as shown figure, The magnitude of changes f in flux through the coil (in webers) is

A

2

B

4

C

6

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
Charge induced in coil is given as
`dq=(dphi_(B))/(R)` = I dt = Area under `i-t` graph
`therefore" "dphi_(B)` =(Area under `i-t` graph)R
`=(1)/(2)xx4xx0.1xx10=2Wb`
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