Get ready for the NCEA Level 1 Energy Test. Utilize flashcards and multiple choice questions with clear explanations and hints. Prepare for success!

Multiple Choice

Which statement best defines current?

Current is the amount of electric charge that passes a point each second, a rate. It is measured in amperes. In a circuit, charges moving through a wire constitute a continuous flow, and the larger that flow (the current), the more charge passes per second. This distinguishes current from energy transfer: the energy moving with those charges depends on voltage and current (power equals voltage times current), but current itself is about how much charge is moving, not about how much energy is being transferred. The energy transferred in a circuit is the total energy or, per second, the power, not the current. The opposition to current describes resistance, which determines how big the current is, not what current is.

Current is the amount of electric charge that passes a point each second, a rate. It is measured in amperes. In a circuit, charges moving through a wire constitute a continuous flow, and the larger that flow (the current), the more charge passes per second. This distinguishes current from energy transfer: the energy moving with those charges depends on voltage and current (power equals voltage times current), but current itself is about how much charge is moving, not about how much energy is being transferred. The energy transferred in a circuit is the total energy or, per second, the power, not the current. The opposition to current describes resistance, which determines how big the current is, not what current is.