A) Zero
B) 10 T
C) 20 T
D) 200 T
Correct Answer: C
Solution :
Particle will move with uniform velocity when it?s acceleration is zero. i.e. \[|{{F}_{m}}|\,=\,mg\Rightarrow mg=qvB\] \[\Rightarrow B=\frac{mg}{qv}=\frac{0.6\times {{10}^{-3}}\times 10}{25\times {{10}^{-9}}\times 1.2\times {{10}^{4}}}=20\,T\]You need to login to perform this action.
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