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Asked by Satish Last Modified
Answer
Harshit Bhardwaj
Potential of an anode, V = 100 V
Magnetic field experienced by the electrons, B = 2.83 × 10−4 T
Radius of the circular orbit r = 12.0 cm = 12.0 × 10−2 m
Mass of each electron = m
Charge on each electron = e
Velocity of each electron = v
The energy of each electron is equal to its kinetic energy, i.e.,
It is the magnetic field, due to its bending nature, that provides the centripetal force 
for the beam. Hence, we can write:
Centripetal force = Magnetic force
Putting the value of v in equation (1), we get:
Therefore, the specific charge ratio (e/m) is
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