Direction: In the following questions, a statement of assertion is fo...
Kilowatt (1000 watt) is the unit of power. Kilowatt hour is the power consumed in one hour = power x time = energy. One watt is equal to Joule per second. Hence, watt # time has units of energy.
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Direction: In the following questions, a statement of assertion is fo...
Assertion : Watt hour has units of energy.
Reason : Kilowatt hour (kW h) is the unit of electric power.
The correct answer is option 'C' which states that the assertion is true but the reason is false. Let's analyze each statement individually to understand why this is the correct answer.
Assertion : Watt hour has units of energy.
- This statement is correct. The watt hour (Wh) is a unit of energy. It represents the amount of energy consumed or generated by a device with a power of one watt over a period of one hour. Energy is typically measured in units such as joules (J) or kilowatt hours (kWh), and watt hour is a smaller unit of energy.
Reason : Kilowatt hour (kW h) is the unit of electric power.
- This statement is incorrect. The kilowatt hour (kWh) is not a unit of electric power, but rather a unit of energy. Electric power is the rate at which electrical energy is consumed or produced, and it is measured in units of watts (W) or kilowatts (kW). The kilowatt hour is a unit of energy that represents the amount of energy consumed or produced at a rate of one kilowatt over a period of one hour.
Explanation:
- The assertion is true because the watt hour is indeed a unit of energy. It represents the amount of energy consumed or generated by a device with a power of one watt over a period of one hour.
- However, the reason is false because the kilowatt hour is not a unit of electric power. It is a unit of energy that represents the amount of energy consumed or produced at a rate of one kilowatt over a period of one hour.
- Therefore, the correct answer is option 'C' which states that the assertion is true but the reason is false. The reason does not provide the correct explanation for the assertion.