Question

The magnetic field shown in the figure consist of the two magnetic filled. If v is the velocity just required for a charge particle of mass m and charge q to pass through the magnetic field. Particle is projected with velocity "v" then, how much time does such a charge spend in the magnetic field.

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

Answer 2

Time = $\frac { \pi \mathrm { m } } { 2 \mathrm { qB } }$

=