**1 Mark Questions**

- What is electric current?
- What is potential difference?
- What is the unit of electric current?
- What is the unit of potential difference?
- What is Ohm’s law?
- What is resistance?
- What is resistivity?
- What are the factors on which the resistance of a conductor depends?
- What is a series combination of resistors?
- What is a parallel combination of resistors?

**2 Mark Questions**

- Explain Ohm’s law with an example.
- 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.
- Explain the series combination of resistors with a diagram.
- Explain the parallel combination of resistors with a diagram.
- 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**

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