Question

Assertion(A): A $200$W bulb consumes $2$ units of electrical energy when it is used for $10$ hours.

Reason(R): $1$ unit of electrical energy $=1000$ kWh.

• A. (A) and (R) are correct and (R) is the correct explanation for (A)
• B. (A) and (R) are correct but (R) is not the correct explanation for (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Answer 1

The correct option is C

(A) is correct but (R) is not correct

Step 1: Given data

Power $=200$W

Time $=10$ hr

Step 2: Finding electrical energy

We know that $E=Pt$

Substituting given values in the above formula

$E=200\times 10$

$E=2000$Wh

Step 3: Converting into kWh

We know that $1$unit$=1$kWh

$E=\frac{2000}{1000}$

$E=2$kWh

Hence, (A) is correct but (R) is not correct

Hence the correct option is (C),