Change set

Pick exam & year, then Go.

Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q37 (CISF/2021) Science & Technology › Basic Science (Physics, Chemistry, Biology)

A 100 W electric bulb is used for 8 hrs/day. What would be the units of energy consumed in the month of April?

Explanation

To calculate the electrical energy consumed in units (kilowatt-hours), we use the formula: Energy = Power × Time.

  • Power of the bulb = 100 W = 0.1 kW (since 1 kW = 1000 W).
  • Usage per day = 8 hours.
  • Number of days in April = 30 days.

Total energy consumed = Power (in kW) × Time (in hours/day) × Number of days
Energy = 0.1 kW × 8 hours/day × 30 days = 24 kWh.

In commercial electricity billing, 1 unit is equivalent to 1 kilowatt-hour (kWh). Therefore, the total energy consumed in the month of April is 24 units.

✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CDS-I · 2023 · Q66 Relevance score: 4.30

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

CDS-II · 2019 · Q9 Relevance score: 3.51

A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days ?

NDA-II · 2011 · Q91 Relevance score: 2.06

An electric lamp of 100 watt is used for 10 hours per day. The ‘units’ of energy consumed in one day by the lamp is

NDA-II · 2024 · Q93 Relevance score: -2.66

An incandescent electric bulb converts 20% of its power consumption into light, and the remaining power is dissipated as heat. The bulb's filament has a resistance of 200 22 and 2 A current flows through it. If the bulb remains ON for 10 h and the rate of electricity charge is ₹5/unit, then which among the following is the correct amount for the money spent on producing light ?