Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 766 · 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: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
2. 2.🔦 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 rubber eraser. Does the bulb glow? (a) No (b) Yes
3. 3.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
4. 4.⚡ What does a room heater mainly change electricity into? (a) movement (b) heat (c) light (d) sound
5. 5.🔘 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) Yes (b) No
6. 6.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) used in house wiring
7. 7.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
8. 8.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
9. 9.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
10. 10.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
11. 11.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
12. 12.Which of these is a conductor? (a) a paper strip (b) a graphite rod (c) a rubber band (d) a rubber eraser
13. 13.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the filament (c) the switch (d) the glass
14. 14.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
15. 15.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
16. 16.⚡ What does a doorbell mainly change electricity into? (a) movement (b) sound (c) light (d) heat
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
18. 18.True or false: one tall, one short bar is the symbol for a cell. (a) True (b) False
19. 19.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). 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) wait and watch (b) pour water on them (c) shout for an adult (d) pull them by the hand
21. 21.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a reed switch (c) a tilt switch (d) a toggle switch
22. 22.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
23. 23.True or false: to dry your hands first is safe. (a) True (b) False
24. 24.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
25. 25.Which of these is true of a parallel circuit? (a) a single current path (b) one out, the rest glow (c) a break stops every bulb (d) bulbs share the voltage
26. 26.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
27. 27.True or false: a doorbell mainly gives out heat. (a) True (b) False
28. 28.🔌 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
29. 29.🔍 Which is the odd one out? (a) a loudspeaker (b) an electric kettle (c) a school bell (d) a doorbell
30. 30.🔍 Which is the odd one out? (a) a rubber band (b) a safety pin (c) a woollen thread (d) a ceramic cup
31. 31.True or false: a buzzer mainly gives out heat. (a) True (b) False
32. 32.🔋 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)? =
33. 33.💡 A battery lights 2 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
34. 34.Which of these is true of a parallel circuit? (a) many paths for current (b) one bulb out, all go out (c) a break stops every bulb (d) a single current path
35. 35.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
36. 36.Which of these is not safe? (a) climb an electric pole (b) use small battery cells (c) build with an adult near (d) dry your hands first
37. 37.True or false: a circle with an X in it is the symbol for a bulb. (a) False (b) True
38. 38.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
39. 39.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to make it colourful (c) symbols are heavier (d) to hide the circuit
40. 40.True or false: a plastic straw is a conductor. (a) False (b) True

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