Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 570 · 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.🔋 5 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)? =
2. 2.Which of these mainly makes sound? (a) a siren (b) an electric iron (c) a table fan (d) an LED lamp
3. 3.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) the same voltage (c) no voltage (d) half the voltage
4. 4.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
5. 5.True or false: a circle with an X in it is the symbol for a cell. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) a water heater (b) a toaster (c) an electric kettle (d) a traffic signal
7. 7.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) ammeter (b) cell (c) wire (d) battery
8. 8.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
9. 9.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
10. 10.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb
11. 11.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
12. 12.True or false: to touch a fallen wire is safe. (a) False (b) True
13. 13.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
15. 15.⚡ What does a street light mainly change electricity into? (a) sound (b) heat (c) movement (d) light
16. 16.🔋 What should you do with used-up cells? (a) cut them open (b) throw them in a fire (c) bury them in soil (d) give them for recycling
17. 17.🔦 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
18. 18.Which of these is a conductor? (a) a wooden stick (b) a rubber band (c) a woollen thread (d) aluminium foil
19. 19.Which of these is safe? (a) stop if a part gets hot (b) climb an electric pole (c) poke things in a socket (d) open a phone charger
20. 20.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
21. 21.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
22. 22.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
24. 24.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
25. 25.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
26. 26.💡 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) dimmer (c) the same
27. 27.🔍 Which is the odd one out? (a) a brass key (b) a metal paper clip (c) a paper strip (d) a copper wire
28. 28.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the filament (c) the glass (d) the switch
29. 29.Which of these is safe? (a) open a phone charger (b) stay away from pylons (c) touch a fallen wire (d) poke things in a socket
30. 30.What does a toggle switch do? (a) closes near a magnet (b) slides side to side (c) stays where you flip it (d) springs back when let go
31. 31.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
32. 32.⚡ What does a buzzer mainly change electricity into? (a) movement (b) light (c) sound (d) heat
33. 33.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the longer line (d) the shorter line
34. 34.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
35. 35.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the steel shaft (d) the bare end
36. 36.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
37. 37.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
38. 38.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
39. 39.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) battery (b) cell (c) bulb (d) voltmeter
40. 40.⚡ What does a traffic signal mainly change electricity into? (a) light (b) sound (c) movement (d) heat

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