Question

A wire is parallel to a square coil. The coil and wire carries currents in the directions shown. Then, at any point A within the coil the magnetic field will be-

• A. Less than the magnetic field produced due to coil only
• B. More than the magnetic field produced due to coil only
• C. Equal to the field by coil alone
• D. Zero

Answer 1

Answer: (B)

More than the magnetic field produced due to coil only

Answer 2

$\left. \begin{array} { l } \text { B due to wire is } \otimes \\ \mathrm { B } \text { due to loop is } \otimes \end{array} \right\} \Rightarrow \mathrm { B } _ { \text {net } } = \mathrm { B } _ { \text {wire } } + \mathrm { B } _ { \text {coil } }$

Ž B_net is more than B_coil.