Question

Due to a straight vertical current carrying conductor, a null point occurred at P on east of the conductor. The net magnetic induction at a point Q which is at same distance on north of the conductor is

• A. $0$
• B. $\sqrt{3}{B}_H$
• C. $B_H$
• D. $\sqrt{2}{B}_H$

Answer 1

The correct option is D $\sqrt{2}{B}_H$

Net magnetic field at a point Q on the north is the resultant of earth's magnetic field and Magnetic field due to wire which is equal to earth's magnetic field in magnitude.