Assertion : Kilowatt hour is the unit of power.
Reason: One kilowatt hour is equivalent to `3.6 xx 10^5` J

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true not but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Explanation

To solve the assertion and reason question, we need to analyze both statements carefully.

### Step 1: Analyze the Assertion
- **Assertion**: "Kilowatt hour is the unit of power."
- **Explanation**: The kilowatt hour (kWh) is actually a unit of energy, not power. Power is defined as the rate at which work is done or energy is transferred over time. The SI unit of power is the watt (W), which is equivalent to joules per second (J/s). Therefore, the assertion is **false**.

### Step 2: Analyze the Reason
- **Reason**: "One kilowatt hour is equivalent to `3.6 x 10^5` J."
- **Explanation**: To determine if this statement is true, we need to convert kilowatt hours to joules.
- 1 kilowatt (kW) = 1000 watts (W)
- 1 hour = 3600 seconds
- Therefore, 1 kilowatt hour = 1000 W × 3600 s = 3,600,000 J = `3.6 x 10^6` J.
- Since the reason states that 1 kWh is equivalent to `3.6 x 10^5` J, this is also **false**.

### Conclusion
- Since both the assertion and the reason are false, the correct answer is that both are incorrect.

### Final Answer
Both the assertion and the reason are false.

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