Question

A uniform but time varying magnetic field $B=(2t^3+24t)T$ is present in a cylindrical region of radius $R=2.5cm$ as shown in figure. The direction of circular electric lines at $t=1s$ is :

• A. $\text{clockwise}$
• B. $\text{anticlockwise}$
• C. $\text{no current is induced}$
• D. $\text{cannot be predicted}$

Answer 1

Answer: (B)

$\text{anticlockwise}$

$⨂$ Magnetic field is increasing. Hence $⨀$ magnetic field is produced by a conducting circular loop placed there. For producing magnetic field induced current should be anti-clockwise. Direction of induced circular electric lines are also anti-clockwise.