alleryStart learning →How is electric power defined in terms of energy?
AThe total electric energy ever stored in a circuit
BThe maximum voltage a circuit element can withstand
CThe number of electrons passing a point, regardless of time
DThe rate at which electric energy is transferred in a circuit
Answer & Solution
Correct answer: D. The rate at which electric energy is transferred in a circuit
1. Power in general is described as a rate of energy transfer, not a fixed amount.
2. Electric power specifically is the rate at which electric energy is transferred in a circuit.
3. A maximum voltage rating and an electron count without a time reference are not the definition given for power.
_Source: OpenStax Physics (CC BY 4.0), Ch 19 "Electrical Circuits", section 19.4 Electric Power_
Keep practising Electrical Circuits
Browse all Electrical Circuits questions for HSC (New South Wales), or explore more Physics topics.
Related questions
Three 10 ohm resistors are connected in parallel across a 9.0 V battery. What power is disAn older incandescent light bulb is rated at 60 W and operates at 120 V. What current flowA circuit has 0.12 A flowing through it across a potential drop of 3.0 V. What power is diA resistor of 100 ohm is connected across a 12 V source. What electric power is dissipatedA 45 ohm resistor and a 60 ohm resistor are wired in parallel with each other. What is theIn that same circuit, the blue branch draws 0.80 A and the red branch draws 0.60 A from thA 10 ohm resistor is connected in parallel with a second resistor R, giving a combined equTen identical resistors, each of resistance R, are connected in parallel. What is the equi