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)=Time (t)Work done (W)
- The SI unit of power is the watt (W).
- 1watt=1joule/second=1J s−1
- Therefore,
1kilowatt (kW)=1000watts=1000J 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.