Question

Some magnetic flux is changed from a coil of resistance $10\Omega$. As a result, an induced current is developed in it, which varies with time as shown in figure. The magnitude of change in flux through the coil is webers is?

• A. $2$
• B. $4$
• C. $6$
• D. $8$

Answer 1

The correct option is A $2$

Change in flux=$\frac{1}{2}\times \Delta t\times R$

=$\frac{1}{2}\times 4\times 0.1\times 10$

=$2wb$