Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 340 · 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.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
3. 3.✏️ In a circuit diagram, which part is drawn as a straight line? (a) ammeter (b) battery (c) switch (d) wire
4. 4.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.True or false: “a single current path” is true of a series circuit. (a) False (b) True
6. 6.⚡ What does a ceiling fan mainly change electricity into? (a) movement (b) sound (c) light (d) heat
7. 7.True or false: a plastic straw is an insulator. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) stay away from pylons (b) stop if a part gets hot (c) take cells out after use (d) throw cells in a fire
9. 9.True or false: to stop if a part gets hot is safe. (a) False (b) True
10. 10.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
11. 11.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) heat (c) sound (d) light
12. 12.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
13. 13.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
14. 14.True or false: aluminium foil is an insulator. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) a street light (b) a mixer grinder (c) an exhaust fan (d) a ceiling fan
16. 16.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
17. 17.Which of these uses electricity? (a) a cell (b) a computer (c) a wind turbine (d) a power station
18. 18.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when both are ON (d) when either is ON
19. 19.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
20. 20.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) wait and watch (c) pull them by the hand (d) shout for an adult
21. 21.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
22. 22.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is ON (c) the switch is OFF (d) the bulb is unscrewed
23. 23.🔦 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 copper wire. Does the bulb glow? (a) Yes (b) No
24. 24.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
26. 26.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the filament (c) the glass (d) the switch
27. 27.Which of these gives us electricity? (a) a bicycle dynamo (b) a television (c) a refrigerator (d) a washing machine
28. 28.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
29. 29.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
30. 30.Which of these mainly gives out light? (a) a room heater (b) an electric drill (c) an electric toy car (d) a street light
31. 31.🔍 Which is the odd one out? (a) a doorbell (b) a water heater (c) a buzzer (d) a school bell
32. 32.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.🔌 Most metals are good … (a) batteries (b) conductors (c) insulators (d) magnets only
34. 34.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
36. 36.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
37. 37.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) cut them open (d) give them for recycling
38. 38.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
39. 39.True or false: a toaster mainly gives out heat. (a) False (b) True
40. 40.🔋 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)? =

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