Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 197 · 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 it safe to take cells out after use? (a) safe (b) not safe
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
4. 4.True or false: an electric kettle mainly gives out light. (a) True (b) False
5. 5.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a mains extension board (d) a small battery pack
6. 6.💡 3 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?
7. 7.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) not joined (d) by Wi-Fi
9. 9.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
10. 10.⚡ What does a doorbell mainly change electricity into? (a) heat (b) sound (c) light (d) movement
11. 11.True or false: a metal paper clip is a conductor. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) open a phone charger (b) keep drinks far away (c) use a cable with cuts (d) use mains for a project
13. 13.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
14. 14.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
15. 15.Which of these is safe? (a) use a cable with cuts (b) keep drinks far away (c) open a phone charger (d) throw cells in a fire
16. 16.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) the bulb is unscrewed (d) all wires are joined
17. 17.Which of these mainly makes sound? (a) a school bell (b) a ceiling fan (c) a room heater (d) an electric toy car
18. 18.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
19. 19.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
20. 20.True or false: to take cells out after use is safe. (a) False (b) True
21. 21.Which of these is safe? (a) use a cable with cuts (b) use small battery cells (c) climb an electric pole (d) poke things in a socket
22. 22.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
23. 23.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
24. 24.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
25. 25.True or false: a woollen thread is a conductor. (a) True (b) False
26. 26.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) each gets the full volts (d) a break stops every bulb
27. 27.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
28. 28.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) give them for recycling (d) cut them open
29. 29.Which drawing is the symbol for a resistor? (a) many long-short pairs (b) a circle with an X in it (c) a small empty box (d) triangle against a bar
30. 30.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
31. 31.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
33. 33.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
34. 34.True or false: a loudspeaker mainly gives out heat. (a) True (b) False
35. 35.True or false: a push button slides side to side. (a) True (b) False
36. 36.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
37. 37.True or false: a safety pin is an insulator. (a) False (b) True
38. 38.Which of these is not safe? (a) build with an adult near (b) keep drinks far away (c) open a phone charger (d) stay away from pylons
39. 39.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
40. 40.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a cell (c) a conductor (d) an insulator

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