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1 kilowatt is equal to _____.
Question

1 kilowatt is equal to _____.

A.

1000 J s1^{-1}​​

B.

1000 J s2^{-2}​​

C.

1000 J S

D.

1000 J 

Correct option is A

The Correct Answer is: (a) 1000 J s⁻¹
Explanation:
Power is defined as the rate of doing work or the rate of energy transfer.

Power (P)=Work done (W)Time (t)\text{Power (P)} = \frac{\text{Work done (W)}}{\text{Time (t)}}​​

  • The SI unit of power is the watt (W).
  • 1 watt=1 joule/second=1 J s11 \, \text{watt} = 1 \, \text{joule/second} = 1 \, \text{J s}^{-1}​​
  • Therefore,

1 kilowatt (kW)=1000 watts=1000 J s11 \, \text{kilowatt (kW)} = 1000 \, \text{watts} = 1000 \, \text{J s}^{-1}​​

Information Booster:

Power is the rate at which work is done or energy is consumed.
1 kilowatt-hour (kWh) = 3.6 × 10⁶ joules (unit of energy used in electricity bills)
Energy (Work) = Power × Time
• Machines with higher power rating consume more energy per unit time.

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