Two long, straight wires are parallel and 10 cm apart. one carries a current of 2.0 a, the other a current of 5.0a. (a) if the two currents flow in opposite directions, whatis the magnitude and direction of the force per unit lengthof one wire on the other? (b) what is the magnitude anddirection of the force per unit length if the currents flow inthe same direction?

Explanation:

Given

Distance between two wires

Current value

(a)If current flows in opposite direction

When current Flows in opposite direction the two wires will repel each other

Force due to current carrying wire

(Repulsive Force)

(b)If current is flowing in the same direction

When direction of current is same then force will be attractive in nature

(attractive Force)

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.