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1 kilowatt is equal to ________.
1000 J s−1
1000 J s−2
1000 J s
1000 J
1000 J s−1
Power is defined as the rate at which work is done or energy is transferred. Since 1 kilowatt (kW) equals 1000 watts (W) and 1 watt is equal to 1 joule per second (J/s), it follows that 1 kW=1000 J/s.
Power is defined as the rate at which work is done or energy is transferred. Since 1 kilowatt (kW) equals 1000 watts (W) and 1 watt is equal to 1 joule per second (J/s), it follows that 1 kW=1000 J/s.
If energy is the amount of water in a bucket, power is how fast you can pour that water out; a kilowatt is simply pouring 1000 times as much water per second as a standard watt.
P=tW — Definition of power where P is power, W is work, and t is time
1 kW=1000 W=1000 J/s — Conversion of kilowatt to joules per second
Power P is mathematically expressed as the ratio of work done W over time t, or P=tW. Because the SI unit for work (energy) is Joule (J) and for time is second (s), the unit of power is sJ, which is known as a Watt (W). The prefix 'kilo' represents a multiplier of 103 or 1000.
The SI unit of power is the Watt (W).
Power measures the rate of energy conversion.
Prefix 'kilo-' denotes 103 in the metric system.
Rating electrical appliances like heaters and motors.
Measurement of electrical energy consumption in grid systems.
Option B (1000 J s−2) represents force or rate of change of acceleration, which is incorrect.
Option C (1000 J s) represents energy multiplied by time, which is incorrect.
Option D (1000 J) represents energy, not power.
A is correct — 1 kilowatt is defined as 1000 watts, which is equivalent to 1000 joules per second.
Always pay attention to units; remember that 'per second' (s−1) is the defining characteristic of power (rate), while energy is simply measured in Joules.
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