A uniform magnetic field of 0.3 T is established along the positive Z-direction. A rectangular loop in XY plane of sides 10 cm and 5 cm carries a current of I = 12 A as shown. The torque on the loop is _____

Options

A. `+1.8xx10^(-2)hatjNm`
B. `-1.8xx10^(-2)hatjNm`
C. zero
D. `-1.8xx10^(-2)hatiNm`

Answer

C

Explanation

Angle between `vecAandvecB" is "0^(@)`.
`therefore` Torque `vectau=NIvecAxxvecB`
= `NIABsintheta`
= `(1)(12)(10xx5xx10^(-4))sin0^(@)`
= 0 (Zero)