Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 67 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
2. 2.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) closed (d) cut
3. 3.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
4. 4.True or false: a traffic signal mainly gives out light. (a) True (b) False
5. 5.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
6. 6.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
7. 7.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) water makes it cold (d) it spoils the paint
8. 8.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) own switch for each bulb (d) a single current path
9. 9.True or false: a rice cooker mainly gives out light. (a) False (b) True
10. 10.🔋 8 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
11. 11.Which of these means the circuit is open? (a) a wire is cut (b) the loop is complete (c) the switch is ON (d) all wires are joined
12. 12.💡 4 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
13. 13.True or false: a push button stays where you flip it. (a) False (b) True
14. 14.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
15. 15.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
16. 16.Which of these is safe? (a) dry your hands first (b) throw cells in a fire (c) touch a switch when wet (d) open a phone charger
17. 17.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) Yes (b) No
19. 19.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) motor (b) battery (c) bulb (d) resistor
20. 20.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
21. 21.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a trusted adult (c) nobody (d) a stranger online
22. 22.True or false: a toaster mainly gives out heat. (a) False (b) True
23. 23.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
24. 24.Which of these is true of a series circuit? (a) each gets the full volts (b) a single current path (c) used in house wiring (d) one out, the rest glow
25. 25.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
26. 26.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
27. 27.Which of these mainly makes sound? (a) a traffic signal (b) a doorbell (c) an LED lamp (d) an electric drill
28. 28.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) never (d) only when both are ON
29. 29.True or false: a ceramic cup is an insulator. (a) True (b) False
30. 30.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
31. 31.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) to make them heavy (d) plastic is an insulator
32. 32.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a safe circuit (d) a short circuit
33. 33.Which of these is safe? (a) stop if a part gets hot (b) poke things in a socket (c) open a phone charger (d) use a cable with cuts
34. 34.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
35. 35.🔍 Which is the odd one out? (a) stay away from pylons (b) fly kites in open fields (c) build with an adult near (d) climb an electric pole
36. 36.🔍 Which is the odd one out? (a) an electric iron (b) a doorbell (c) a water heater (d) a room heater
37. 37.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
38. 38.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
39. 39.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series

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