Magnetic Effects Of Current Question 366

Question: A particle having a charge of $ 20\mu C $ and mass $ 20\mu g $ moves along a circle of radius $ 5.0cm $ under the action of a magnetic field $ B=1.0T $ . Now a uniform electric field is switched on and it is found that the particle continues on the tangent with a uniform velocity. The electric field (in V/m) will be-

Solution:

Answer: 50.00