Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 958 · 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.⚡ What does a siren mainly change electricity into? (a) light (b) sound (c) heat (d) movement
2. 2.🔍 Which is the odd one out? (a) touch a switch when wet (b) touch a fallen wire (c) use small battery cells (d) throw cells in a fire
3. 3.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
4. 4.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are OFF (c) only when both are ON (d) never
5. 5.🔦 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 glass marble. Does the bulb glow? (a) Yes (b) No
6. 6.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
7. 7.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a push button (c) a tilt switch (d) a reed switch
8. 8.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
9. 9.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
10. 10.Which of these gives us electricity? (a) a computer (b) an air conditioner (c) a solar panel (d) a mobile phone
11. 11.Which of these is a conductor? (a) a woollen thread (b) a safety pin (c) a plastic straw (d) a dry cork
12. 12.Which of these mainly gives out heat? (a) a room heater (b) a street light (c) a ceiling fan (d) a traffic signal
13. 13.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) No (b) Yes
14. 14.True or false: a glass marble is a conductor. (a) False (b) True
15. 15.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
16. 16.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
17. 17.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
18. 18.Which of these is safe? (a) poke things in a socket (b) use mains for a project (c) open a phone charger (d) build with an adult near
19. 19.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
20. 20.True or false: a small empty box is the symbol for a junction. (a) True (b) False
21. 21.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
22. 22.Which of these is a conductor? (a) a paper strip (b) a rubber band (c) a rubber eraser (d) a copper wire
23. 23.🔌 Which metal is used for most electric wires at home? (a) rubber (b) copper (c) plastic (d) glass
24. 24.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
25. 25.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
26. 26.Which of these mainly gives out light? (a) a night lamp (b) a toaster (c) a room heater (d) a loudspeaker
27. 27.Which of these uses electricity? (a) a generator (b) a bicycle dynamo (c) a wind turbine (d) a mobile phone
28. 28.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
29. 29.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
30. 30.⚡ What does a doorbell mainly change electricity into? (a) light (b) heat (c) movement (d) sound
31. 31.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) a smaller voltage (c) the same voltage (d) no voltage
32. 32.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) own switch for each bulb (d) a break stops every bulb
33. 33.Which of these mainly gives out heat? (a) a toaster (b) an electric toy car (c) a traffic signal (d) a siren
34. 34.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
35. 35.🔘 A bulb and a cell are joined through 4 switches on 4 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
36. 36.True or false: triangle, bar and arrows is the symbol for a resistor. (a) False (b) True
37. 37.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
38. 38.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
39. 39.Which of these mainly gives out light? (a) an electric kettle (b) a rice cooker (c) a tube light (d) an electric iron
40. 40.What does a reed switch do? (a) springs back when let go (b) flips up or down (c) closes near a magnet (d) stays where you flip it

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