Question

According to the right-hand rule sign convention for Ampere's law, currents flowing in the direction of the thumb are taken as ______ and currents flowing opposite to it are taken as ______.

Options

• positive (+); negative (–)

• negative (–); positive (+)

• positive (+); positive (+)

• zero; positive (+)

Answer 1

Current flowing in the thumb's direction is assigned a positive (+) sign, while current flowing in the opposite direction is assigned a negative (–) sign. This is essential for computing \[I_{enc}\].