question_answer

A positively charged disk is rotated clockwise as shown in the figure. What is the direction of the magnetic field at point A in the plane of the disk.

A)  \[\otimes \] (into the page)   

B)  \[\xrightarrow[{}]{{}}\]

C)  \[\xleftarrow{{}}\]         

D)         \[\bigcirc \bullet \] (out of the page)

Correct Answer: D

Solution :

 For circular wire