Question

3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of ${30}^{\circ }$ with the direction of the field. It experiences a force of magnitude

• A. $3\times {10}^{4}N$.
• B. $3\times {10}^{2}N$.
• C. $3\times {10}^{-2}N$.
• D. $3\times {10}^{-4}N$.

Answer 1

The correct option is C $3\times {10}^{-2}N$.

By using $F=Bilsin\theta \Rightarrow F=(500\times {10}^{-4})\times 3\times 0.4\times sin{30}^{\circ }=3\times {10}^{-2}N$.