AP EAMCET201825 Apr 2018Morning ShiftPhysicsMagnetic Effects of CurrentActual
A current carrying square loop is placed near a straight infinitely long current carrying wire as shown in figure. The torque acting on the loop is
Options
- Aμ 0 2 π i 1 i 2 l a b
- Bμ 0 2 π i 1 i 2 l a ( a + b )
- Cμ 0 2 π i 1 i 2 i ( b - a ) a b
- D0
Correct answer
D. 0
Step-by-step solution
Recall the formula of torque due to current carrying loop is, ζ = N i A B sin θ , here N ,   i ,   A   &   B are a number of turns, current in the coil, area of the coil and magnetic field here θ is the angle between area vector and direction of the magnetic field which is 0 ° (by using right hand thum rule) so torque will be zero.