Question

A uniform magnetic field of strength B =2mT exists vertically downwards. These magnetic field lines pass through a closed surface as shown in the figure. The closed surface consists of a hemisphere S1 , a right circular cone S2 and a circular surface S3 . The magnetic flux through S1 and S2 are respectively

• A. ΦS1=-20μWb,ΦS2=+20μWb
• B. ΦS1=+20μWb,ΦS2=-20μWb
• C. ΦS1=-40μWb,ΦS2=+40μWb
• D. ΦS1=+40μWb,ΦS2=-40μWb

Answer 1

Answer: (A)

ΦS1=-20μWb,ΦS2=+20μWb

Answer 2

The correct answer is Option (A) : ΦS1=-20μWb,ΦS2=+20μWb