Match each electrical quantity or unit in List I with its corresponding formula or definit… — JAMB UTME

Match each electrical quantity or unit in List I with its corresponding formula or definition in List II.

Electrical Power ( $P$ )Product of potential difference and current ( $V \times I$ )
Electrical Energy ( $E$ )Product of electrical power and time ( $P \times t$ )
SI unit of Electric PowerWatt ( $\text{W}$ )
Commercial unit of Electrical EnergyKilowatt-hour ( $\text{kWh}$ )

Electrical Power (

P

) matches Product of potential difference and current (

V \times I

); Electrical Energy (

E

) matches Product of electrical power and time (

P \times t

); SI unit of Electric Power matches Watt (

\text{W}

); Commercial unit of Electrical Energy matches Kilowatt-hour (

\text{kWh}

Electrical power is defined by the product of potential difference and current (

P = VI

) and measured in Watts (

\text{W}

). Electrical energy is power multiplied by time (

E = Pt

) and commercially measured in Kilowatt-hours (

\text{kWh}

Identify the formula for electrical power.

Electrical power

P = VI

Power represents the rate of electrical energy dissipation across a potential difference.

Identify the formula for electrical energy.

Electrical energy

E = P \times t

Energy is the work done over a period of time.

Determine the standard SI unit for power.

The SI unit of power is the Watt (

\text{W}

One Watt is defined as one Joule per second.

Determine the commercial unit for electrical energy.

The commercial unit of energy is the Kilowatt-hour (

\text{kWh}

1 kWh is equal to

3.6 \times 10^6\,\text{J}

, which is convenient for commercial electricity billing.

Electrical Energy and Power Definitions and Units

Question