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Question : 110 of 160
Marks:
+1,
-0
Solution:
Force on a charged particle moving in region of a magnetic field is given by :
F=q(v×B) ...(i) Here,
q=1.0×10−16C v=(2+4)ms−1,B=B0(+4)T F=3×10−16N Subtracting in
Eq(i), we get :
3×10−16=1×10−16 ⇒3=(0)−(0)+(8B0−4B0) ⇒3=4B0 or
B0=0.75T
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