A 100 W electric bulb is used for 10 hours a day How many units of electric bull al energy...........

General Science (CDS) Physics

A 100 W electric bulb is used for 10 hours a day. How many units of electric •al energy are consumed by the bulb in 3 days? (1 unit = 1 kWh)

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2023 CDS -1 GK

3.00

1.08

2.16

0.33

To determine the number of units of electrical energy consumed by a 100 W bulb used for 10 hours a day over 3 days, we follow this method:

- Power of the bulb: 100 W or 0.1 kW (since 1 kW = 1000 W)

- Daily consumption: 0.1 kW × 10 hours = 1 kWh

- Consumption over 3 days: 1 kWh/day × 3 days = 3 kWh

Each kWh is equivalent to 1 unit of electrical energy. Therefore, for 3 days, this bulb consumes 3 units.

- Option 1: 3.00 ( Correct Answer)

- Option 2: 1.08

- Option 3: 2.16

- Option 4: 0.33

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