Homework Answers
Solution)
Here, magnetic force= weight of the particle
So, Bqv=mg
Or, B= mg/qv
Mass, m=0.18 g=0.18*10^-3 kg
Charge, q=2.31*10^-8 C
Velocity, v=4*10^4 m/s
Hence, B=(0.18*10^-3 kg)*(9.8)/(2.3*10^-8 C)*(4*10^4 m/s)
B=1.909 T (Ans)
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