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Two long parallel wires carrying current 2.5 amps and i amps in the same direction directed into the plane of the paper) are held at P and Q respectively such that they are perpendicular to the Plane of Paper. The points P and Q are located at a distance of 5 \mathrm{~m} and 2 \mathrm{~m} from a collinear point R

An elector n moving with a velocity of 4 \times 10^5 \mathrm{~m} / \mathrm{s} along the Positive x-direction experiences a force of magnitude 3.2 \times 10^{-20} \mathrm{~N} at the point R. Find the value of i.
(a) $4 A$
(b) $8 A$
(d) rome

Option: 1

4A


Option: 2

8A


Option: 3

16A


Option: 4

none


Answers (1)

best_answer

Net force

\begin{aligned} & =\operatorname{ev}\left(B_1+B_2\right) \\ & \Rightarrow 3.2 \times 10^{-20}=1.6 \times 10^{-19} \times 9 \times 10^5\left[\frac{\mu_0(2.5)}{2 \pi(5)}+\frac{\mu_{0 i}}{2 \pi(2)}\right] \\ & \Rightarrow \quad i=4 A \end{aligned}

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