Consider a current-carrying loop with current , radius , and center .

What would happen to the magnetic field at point if the radius was halved and current was multiplied by four?

Two infinitely long wires having currents and are separated by a distance .

The current is 6A into the page. The current is 9A into the page. The distance of separation is 1.5mm. The point lies 1.5mm away from on a line connecting the centers of the two wires.

What is the magnitude and direction of the net magnetic field at the point ?

Consider two long, straight, current-carrying wires at distance from each other, each with a current of magnitude going in opposite directions.

What is the magnitude of the magnetic field at a point equidistant from both wires?

Consider a current-carrying loop with current , radius , and center .

What is the magnitude of the magnetic field at point ?

Consider a current-carrying loop with current , radius , and center .

What is the direction of the magnetic field produced?