Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 783 · 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.Which of these mainly gives out heat? (a) a buzzer (b) an electric kettle (c) a torch (d) an exhaust fan
2. 2.Which of these means the circuit is open? (a) the loop is complete (b) the bulb is unscrewed (c) the switch is ON (d) all wires are joined
3. 3.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.Which of these is not safe? (a) stay away from pylons (b) use small battery cells (c) stop if a part gets hot (d) touch a fallen wire
5. 5.Which of these gives us electricity? (a) a mobile phone (b) a cell (c) a computer (d) an air conditioner
6. 6.What does a slide switch do? (a) closes when tipped over (b) flips up or down (c) stays where you flip it (d) slides side to side
7. 7.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
8. 8.🔋 7 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)? =
9. 9.🔘 A bulb and a cell are joined through 5 switches on 5 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?
10. 10.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) heat (c) movement (d) light
11. 11.🔘 A bulb and a cell are joined through 6 switches on 6 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?
12. 12.⚡ What does a tube light mainly change electricity into? (a) heat (b) movement (c) sound (d) light
13. 13.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
14. 14.Which drawing is the symbol for a motor? (a) a circle with V inside (b) a plain rectangle (c) a circle with M inside (d) a dot where wires meet
15. 15.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
16. 16.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) one single wire (d) a kind of bulb
17. 17.Which of these is safe? (a) use a cable with cuts (b) touch a fallen wire (c) use mains for a project (d) use small battery cells
18. 18.Which of these mainly makes sound? (a) an electric kettle (b) a water heater (c) a siren (d) an LED lamp
19. 19.Which drawing is the symbol for a capacitor? (a) a dot where wires meet (b) two equal parallel lines (c) a circle with V inside (d) a circle with a cross
20. 20.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) bulbs share the voltage (d) own switch for each bulb
21. 21.🔍 Which is the odd one out? (a) a safety pin (b) an iron nail (c) a rubber eraser (d) a metal paper clip
22. 22.True or false: a reed switch slides side to side. (a) True (b) False
23. 23.Which of these is true of a series circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) many paths for current (d) one out, the rest glow
24. 24.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
25. 25.True or false: to use a cable with cuts is not safe. (a) True (b) False
26. 26.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
27. 27.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
28. 28.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
29. 29.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
30. 30.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) wind energy (c) sound energy (d) chemical energy
31. 31.Which of these mainly makes sound? (a) a table fan (b) a buzzer (c) a rice cooker (d) a night lamp
32. 32.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
33. 33.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) throw them in a fire (d) bury them in soil
34. 34.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) Yes (b) No
35. 35.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
36. 36.True or false: a cotton thread is a conductor. (a) True (b) False
37. 37.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) sound (d) friction
38. 38.🔘 What does a switch do in a circuit? (a) changes the voltage (b) stores current (c) opens or closes the loop (d) makes electricity
39. 39.Which of these is not safe? (a) take cells out after use (b) stop if a part gets hot (c) build with an adult near (d) poke things in a socket
40. 40.🔍 Which is the odd one out? (a) a plastic ruler (b) a cotton thread (c) a metal paper clip (d) a paper strip

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