Question

A vertical straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is ______

Options

• greater than at Q.

• same as at Q.

• less than at Q.

• greater or less than at Q depending upon the strength of the current.

Answer 1

A vertical straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is the same as at Q.

Explanation:

As B = `mu_0/(4pi)(2"I")/"r"`, for the same distance, the field will remain the same.