Electricity - Series and Parallel

Grade 9 Science — Electricity - Series and Parallel: 25 practice questions with instant scoring and explanations.

1. In a series circuit, the current through each component is:
2. In a parallel circuit, the potential difference across each branch is:
3. Three resistors of 2 Ω, 3 Ω, and 6 Ω are connected in series. Total resistance is:
4. Three resistors of 2 Ω, 3 Ω, and 6 Ω are connected in parallel. Total resistance is:
5. In a series circuit with a 12 V battery and total resistance of 6 Ω, the current is:
6. Two 5 Ω resistors in parallel have an equivalent resistance of:
7. In a household electrical circuit, appliances are typically connected in:
8. If one bulb burns out in a series circuit, what happens?
9. If one bulb burns out in a parallel circuit, what happens?
10. The total power in a circuit is given by:
11. If an appliance rated 1000 W is connected to 220 V, the current through it is approximately:
12. The heat produced in a conductor is given by: H = VIt or H = I²Rt. If current doubles, heat becomes:
13. A wire of resistance 10 Ω carries 2 A for 5 seconds. Heat produced is:
14. Power consumption of an appliance is measured by:
15. The unit of electrical energy is:
16. An appliance uses 2 kW for 3 hours. Energy consumed is:
17. The cost of electricity is based on:
18. In a circuit with 12V battery and series resistors of 2Ω and 4Ω, the current is:
19. A 220V household circuit has a maximum current of 15A. The maximum power it can handle is:
20. Two bulbs of 60W and 40W are connected in parallel to 220V. Total current is approximately:
21. If the resistance of a wire increases due to heating, and voltage is constant, the current:
22. The equivalent resistance of n identical resistors each of R ohms, connected in parallel, is:
23. In a household circuit, the live wire is:
24. The neutral wire colour in a household circuit is:
25. When two 6Ω resistors are connected in series with a 12V battery, the power dissipated in each resistor is: