A rectangular loop carrying a current i is placed in a uniform magnetic field B . The…
Physics · JEE Advanced · NTA Exams — Magnetic Effects of Current and Magnetism
A rectangular loop carrying a current i is placed in a uniform magnetic field B. The area enclosed by the loop is A. If there are n turns in the loop, the torque acting on the loop is given by
- \(\mathrm{ni} \overrightarrow{\mathrm{~A}} \times \overrightarrow{\mathrm{B}}\)
- \(\mathrm{ni} \overrightarrow{\mathrm{~A}} \cdot \overrightarrow{\mathrm{~B}}\)
- \(\frac{1}{\mathrm{n}}(\mathrm{i} \overrightarrow{\mathrm{~A}} \times \overrightarrow{\mathrm{B}})\)
- \(\frac{1}{\mathrm{n}}(\mathrm{i} \overrightarrow{\mathrm{~A}} \cdot \overrightarrow{\mathrm{~B}})\)
Answer
(A) ni ~A B
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