# 50-mark question paper on electric current, potential difference, and electric current for class 10 science

1 Mark Questions

1. What is electric current?
2. What is potential difference?
3. What is the unit of electric current?
4. What is the unit of potential difference?
5. What is Ohm’s law?
6. What is resistance?
7. What is resistivity?
8. What are the factors on which the resistance of a conductor depends?
9. What is a series combination of resistors?
10. What is a parallel combination of resistors?

2 Mark Questions

1. Explain Ohm’s law with an example.
2. Calculate the resistance of a conductor of length 10 m and area of cross-section 20 cm2, if the resistivity of the material of the conductor is 100 Ωm.
3. Explain the series combination of resistors with a diagram.
4. Explain the parallel combination of resistors with a diagram.
5. Calculate the equivalent resistance of a circuit consisting of three resistors of 2 Ω, 4 Ω, and 6 Ω connected in series.

3 Mark Questions

1. Explain the heating effect of electric current with an example.
2. Calculate the power dissipated in a 2 Ω resistor when a current of 2 A flows through it.
3. Explain the application of series combination of resistors in a flashlight.
4. Explain the application of parallel combination of resistors in a household circuit.
5. Discuss the safety measures to be taken while working with electricity.

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