Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 949 · 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.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
2. 2.What does a toggle switch do? (a) closes when tipped over (b) works only while pressed (c) slides side to side (d) flips up or down
3. 3.True or false: to take cells out after use is safe. (a) False (b) True
4. 4.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
5. 5.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 4 glow? (a) No (b) Yes
6. 6.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
7. 7.⚠️ 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) pull them by the hand (d) shout for an adult
8. 8.Which of these uses electricity? (a) a refrigerator (b) a battery (c) a cell (d) a generator
9. 9.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a plastic straw. Does the bulb glow? (a) Yes (b) No
10. 10.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is an insulator (c) plastic is a conductor (d) to make them heavy
11. 11.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
12. 12.True or false: two equal parallel lines is the symbol for a battery. (a) True (b) False
13. 13.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
14. 14.True or false: a dot where wires meet is the symbol for a cell. (a) True (b) False
15. 15.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) the shorter line (d) both lines
16. 16.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
17. 17.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) two (d) one for each bulb
18. 18.🔋 6 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)? =
19. 19.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a push button
20. 20.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
21. 21.Which of these uses electricity? (a) a cell (b) a power station (c) a solar panel (d) a television
22. 22.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 4 glow? (a) Yes (b) No
24. 24.True or false: a plastic ruler is an insulator. (a) False (b) True
25. 25.Which of these is an insulator? (a) a steel coin (b) a steel spoon (c) a woollen thread (d) aluminium foil
26. 26.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the switch (c) the filament (d) the glass
27. 27.🔋 5 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
28. 28.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
29. 29.True or false: a toggle switch springs back when let go. (a) False (b) True
30. 30.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
31. 31.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a trusted adult (c) nobody (d) a stranger online
32. 32.True or false: triangle against a bar is the symbol for a junction. (a) True (b) False
33. 33.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a rubber eraser. Does the bulb glow? (a) No (b) Yes
34. 34.🔘 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
35. 35.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
36. 36.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
38. 38.True or false: a straight line is the symbol for a switch. (a) False (b) True
39. 39.🔘 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 ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
40. 40.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?

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