Class 10 / Science
Class 10 Science Electricity Worksheet
Practice Ohm's law, resistance, circuits, electric power, heating effect, and energy consumption.
advanced50 minutesAnswer key included
Learning objective
Practise definitions, Ohm's law, resistance, circuit combinations, power, and energy numericals.
Questions
- Define electric current.
- Define potential difference.
- State Ohm's law.
- Find current when V = 10 V and R = 5 ohm.
- Find resistance when V = 12 V and I = 3 A.
- What happens to resistance when length of wire increases?
- Differentiate series and parallel circuits.
- Find equivalent resistance of 2 ohm and 4 ohm in series.
- Write the formula for electric power.
- A 100 W bulb is used for 10 hours. Find energy consumed in kWh.
Answer key
Show suggested answers
- Electric current is the rate of flow of electric charge, I = Q/t.
- Potential difference is work done per unit charge, V = W/Q.
- Ohm's law: V = IR at constant temperature.
- I = V/R = 10/5 = 2 A.
- R = V/I = 12/3 = 4 ohm.
- Resistance increases when length increases, if material and area stay the same.
- In series, current is same and resistances add. In parallel, voltage is same and equivalent resistance decreases.
- Equivalent resistance = 2 + 4 = 6 ohm.
- Electric power: P = VI = I^2R = V^2/R.
- Energy = 100 W x 10 h = 1000 Wh = 1 kWh.
How to use this worksheet
Students can solve the questions independently first, then review errors with a parent or teacher. Teachers can use it as a short class activity, homework sheet, or revision check.
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