Question

what is the definition of power?
the rate at which energy is transferred or transformed.
the number of electrons used.
the amount of energy transferred or transformed by a force.
the rate of flow of charge.
the amount of energy per unit charge.
the number of kwh used.

Explanation:

Power is defined as the rate at which energy is transferred or transformed. The formula for power is \(P=\frac{W}{t}\), where \(W\) is the work done (energy transferred) and \(t\) is the time taken.

• The number of electrons used is not related to the definition of power.
• The amount of energy transferred or transformed by a force is work (\(W = F\times d\), where \(F\) is force and \(d\) is displacement), not power.
• The rate of flow of charge is current (\(I=\frac{Q}{t}\), where \(Q\) is charge and \(t\) is time).
• The amount of energy per unit charge is voltage (\(V=\frac{W}{Q}\)).
• The number of kWh used is a measure of energy consumption over time (since \(1\space kWh= 1000\space W\times3600\space s\)), not the definition of power itself.

Answer:

The rate at which energy is transferred or transformed.