Question

A 100 W electric bulb is used for 5 hours daily. What is the energy consumed in 30 days?

• A. 15 kWh
• B. 10 kWh
• C. 5 kWh
• D. 20 kWh

Answer 1

The Correct Option is A

Step 1: Convert power to kilowatts \[ 100\ \text{W} = 0.1\ \text{kW} \] Step 2: Total time used = 5 hours/day × 30 days = 150 hours Step 3: Energy consumed = Power × Time \[ E = 0.1 \times 150 = 15\ \text{kWh} \] \[ \boxed{15\ \text{kWh}} \]