A 100 W bulb is used for 5 hours. How much energy does it consume? (2016)
Practice Questions
Q1
A 100 W bulb is used for 5 hours. How much energy does it consume? (2016)
500 Wh
1000 Wh
200 Wh
250 Wh
Questions & Step-by-Step Solutions
A 100 W bulb is used for 5 hours. How much energy does it consume? (2016)
Step 1: Identify the power of the bulb, which is 100 watts (W).
Step 2: Identify the time the bulb is used, which is 5 hours (h).
Step 3: Use the formula for energy consumed, which is Energy = Power × Time.
Step 4: Substitute the values into the formula: Energy = 100 W × 5 h.
Step 5: Calculate the energy: 100 W × 5 h = 500 watt-hours (Wh).
Power and Energy – Understanding the relationship between power (in watts) and energy consumption (in watt-hours) is essential for solving problems related to electrical devices.
