Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 154 · 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 means the circuit is closed? (a) a cell is taken out (b) a wire has come loose (c) a wire is cut (d) the loop is complete
2. 2.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
3. 3.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
4. 4.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) broken (d) cut
6. 6.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
7. 7.True or false: a tilt switch stays where you flip it. (a) True (b) False
8. 8.🔋 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)? =
9. 9.🔍 Which is the odd one out? (a) a street light (b) an electric toy car (c) an exhaust fan (d) a ceiling fan
10. 10.True or false: a torch mainly gives out light. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) touch a switch when wet (b) use a cable with cuts (c) poke things in a socket (d) fly kites in open fields
12. 12.🔦 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
13. 13.⚡ What does a room heater mainly change electricity into? (a) sound (b) movement (c) light (d) heat
14. 14.True or false: triangle, bar and arrows is the symbol for a switch. (a) True (b) False
15. 15.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
16. 16.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
17. 17.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
18. 18.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) capacitor (c) wire (d) cell
19. 19.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
20. 20.💡 5 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. How many bulbs glow?
21. 21.Which of these is safe? (a) fly a kite near wires (b) open a phone charger (c) dry your hands first (d) use mains for a project
22. 22.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
23. 23.🔌 Which metal is used for most electric wires at home? (a) plastic (b) copper (c) glass (d) rubber
24. 24.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
25. 25.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a reed switch
26. 26.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
27. 27.🔍 Which is the odd one out? (a) use small battery cells (b) take cells out after use (c) dry your hands first (d) poke things in a socket
28. 28.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a closed circuit (c) a full circuit (d) an open circuit
29. 29.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
30. 30.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
31. 31.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
32. 32.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) junction (c) resistor (d) battery
33. 33.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.True or false: to use small battery cells is safe. (a) True (b) False
35. 35.Which of these is safe? (a) poke things in a socket (b) open a phone charger (c) use a cable with cuts (d) stop if a part gets hot
36. 36.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
37. 37.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) wind energy (c) chemical energy (d) sound energy
38. 38.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
40. 40.🔍 Which is the odd one out? (a) use small battery cells (b) build with an adult near (c) stay away from pylons (d) open a phone charger

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