A planar coil having 15 turns carries 20 A current. The coil is oriented with respect to the uniform magnetic field $B = 0.5 \hat{i}$ T such that its directed area is $A = - 0.04 \hat{i} m^{2}$ . The potential energy of the coil in the given orientation is

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.

An Intiative by Sri Chaitanya

+0.72 J

$-$ 1.44 J

6 J

answer is C.

(Unlock A.I Detailed Solution for FREE)

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Here, $B = 0.5 T; I = 20 A; N = 15; A = - 0.04 \hat{i} m^{2}$

Magnetic moment of the coil,

$M = N I A$

$= (15) (20) (- 0.04 \hat{i}) = - 12 \hat{i} {Am}^{2}$

The potential energy of the coil in the given orientation

$U = - M \cdot B = - (- 12 \hat{i}) \cdot (0.5 \hat{i}) = + 6 J$

Watch 3-min video & get full concept clarity

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test