Back to Magnetism and MatterThe figure shows a region of length ‘l’ with a
uniform magnetic field of 0.3 T in it and a
proton entering the region with velocity 4 \times 10
5
ms
–1
making an angle 60
o
with the field. If the
proton completes 10 revolution by the time it
cross the region shown, ‘l’ is close to
(mass of
proton = 1.67 \times 10
–27
kg, charge of the proton =
1.6 \times 10
–19
C)
Class 12 • Physics • Chapter-5
Magnetism and Matter
Question 190 of 316
190MediumJEE Mains2020
