The torque required to hold a small circular coil of 10 turns, area $1 \times 10^{-6} \, \text{m}^2$, and carrying a current of $2 \, \text{A}$ in the middle of a long solenoid of $10^{3}$ turns/m, carrying a current of $2.5 \, \text{A}$, with its axis perpendicular to the axis of the solenoid, is ...............

Question

$1.5 \times 10^{-6} \, \text{N}$

$1.5 \times 10^{-8} \, \text{N}$

$1.5 \times 10^{+6} \, \text{N}$

$1.5 \times 10^{+8} \, \text{N}$

Solution

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