Class 10 Physics simulations · Electricity

Electric power and the electricity bill

Choose an appliance rating and how long it runs. Find the current, the heat produced and the monthly bill.

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What to notice

A geyser or heater uses far more energy than a bulb; 1 unit = 1 kWh = 3.6 × 10⁶ J.

Key relation

P = VI = I²R = V²/R, E (kWh) = P (kW) × t (h)

Try this

Compare a 9 W LED bulb with a 2000 W geyser used 1 hour a day.

What you can change

• Power rating: 5 to 3000 W
• Use per day: 0.5 to 24 h
• Tariff: 2 to 12 ₹/unit

More in Electricity

• Cells in series and parallel
• Ohm’s law circuit
• Electron drift in a wire
• Series and parallel resistors
• Resistance of a wire

See all Class 10 Physics simulations or every Physica simulation.