Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the figure. The regions which contain some points of zero magnetic induction are:

Question

Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the figure. The regions which contain some points of zero magnetic induction are: (A) I and II (B) I and III (C) I and IV (D) II and III

Tardigrade Admin · Accepted Answer

Magnetic field due to both currents at each point on line

C D

being equal and opposite cancel while at each point on line

A B

they are added up.
Hence, magnetic induction in regions

I

and

I V

will be zero.

Q. Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the figure. The regions which contain some points of zero magnetic induction are:

I and II

I and III

I and IV

II and III

Magnetic field due to both currents at each point on line CDbeing equal and opposite cancel while at each point on line AB they are added up. Hence, magnetic induction in regions I and IV will be zero.

Magnetic field due to both currents at each point on line $C D$ being equal and opposite cancel while at each point on line $A B$ they are added up.
Hence, magnetic induction in regions $I$ and $I V$ will be zero.