Question

The work done by a source in taking unit charge from lower to higher potential energy is called the source's:

• A. Electric current
• B. Electric conductivity
• C. Electric field intensity
• D. Electromotive force
• E. Electric flux

Hint:

Electromotive force (emf) refers to the energy provided by a source per unit charge to move the charge from one potential to another. It is not a force in the traditional sense but a potential difference that drives current.

Answer 1

The Correct Option is D

The work done by a source in moving a unit charge from a lower potential to a higher potential is called electromotive force (emf). It is a measure of the energy provided by the source per unit charge. The emf is responsible for driving the flow of charge (current) in an electrical circuit.
Mathematically, the emf is defined as: \[ \mathcal{E} = \frac{W}{q} \] where: - \( W \) is the work done by the source in moving a charge \( q \),
- \( \mathcal{E} \) is the electromotive force.
Thus, the correct answer is: \[ \boxed{{D) Electromotive force}} \]