Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 792 · 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.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
2. 2.💡 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. Bulb 1 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
3. 3.Which of these is safe? (a) poke things in a socket (b) use a cable with cuts (c) use mains for a project (d) keep drinks far away
4. 4.Which of these is true of a series circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) used in house wiring (d) many paths for current
5. 5.Which of these uses electricity? (a) a cell (b) a mobile phone (c) a solar panel (d) a generator
6. 6.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
7. 7.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
8. 8.🔍 Which is the odd one out? (a) use small battery cells (b) touch a fallen wire (c) use mains for a project (d) touch a switch when wet
9. 9.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
10. 10.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
11. 11.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) capacitor (b) LED (c) motor (d) ammeter
12. 12.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
13. 13.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
14. 14.Which of these gives us electricity? (a) a battery (b) a washing machine (c) a mobile phone (d) a refrigerator
15. 15.What does a reed switch do? (a) stays where you flip it (b) slides side to side (c) springs back when let go (d) closes near a magnet
16. 16.Which of these mainly gives out heat? (a) a tube light (b) an electric kettle (c) a street light (d) a school bell
17. 17.🔍 Which is the odd one out? (a) a school bell (b) a tube light (c) a siren (d) a doorbell
18. 18.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
20. 20.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
22. 22.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
23. 23.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
24. 24.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
25. 25.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
26. 26.True or false: to touch a switch when wet is not safe. (a) True (b) False
27. 27.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
28. 28.🔋 4 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)? =
29. 29.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
30. 30.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) copper (d) glass
31. 31.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) by Wi-Fi (d) not joined
32. 32.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
33. 33.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) wire (c) ammeter (d) bulb
34. 34.Which of these is not safe? (a) build with an adult near (b) stay away from pylons (c) use mains for a project (d) dry your hands first
35. 35.True or false: a circle with a cross is the symbol for a resistor. (a) False (b) True
36. 36.True or false: a straight line is the symbol for a wire. (a) True (b) False
37. 37.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it is just untidy (c) it spoils the paint (d) water makes it cold
38. 38.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) No (b) Yes
39. 39.⚡ What does a rice cooker mainly change electricity into? (a) movement (b) heat (c) sound (d) light
40. 40.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?

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