Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 592 · 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.What does a push button do? (a) flips up or down (b) works only while pressed (c) slides side to side (d) stays where you flip it
2. 2.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
3. 3.Which of these is not safe? (a) use small battery cells (b) climb an electric pole (c) take cells out after use (d) stay away from pylons
4. 4.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is ON and D is OFF. Does the bulb glow? (a) Yes (b) No
5. 5.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
6. 6.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
7. 7.🔦 A circuit has a used-up (dead) 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 wooden stick. Does the bulb glow? (a) Yes (b) No
8. 8.💡 A battery lights 2 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
9. 9.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a slide switch (c) a toggle switch (d) a tilt switch
10. 10.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
11. 11.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
12. 12.🔋 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)? =
13. 13.Which of these uses electricity? (a) a wind turbine (b) a generator (c) a television (d) a cell
14. 14.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) a ceiling fan (b) a room heater (c) an electric iron (d) an electric kettle
16. 16.💡 5 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?
17. 17.True or false: an LED lamp mainly gives out light. (a) True (b) False
18. 18.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
19. 19.Which drawing is the symbol for an LED? (a) a line lifted at a gap (b) a long and a short line (c) a straight line (d) triangle, bar and arrows
20. 20.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a safe circuit (c) an open circuit (d) a short circuit
21. 21.💡 4 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
22. 22.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) only when both are ON (d) never
23. 23.True or false: a loudspeaker mainly makes movement. (a) True (b) False
24. 24.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
25. 25.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
26. 26.Which of these is safe? (a) fly kites in open fields (b) fly a kite near wires (c) touch a switch when wet (d) throw cells in a fire
27. 27.🔘 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
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) Yes (b) No
29. 29.Which of these means the circuit is closed? (a) a cell is taken out (b) all wires are joined (c) a wire has come loose (d) a wire is cut
30. 30.True or false: a reed switch stays where you flip it. (a) True (b) False
31. 31.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) none (d) one for each bulb
32. 32.Which of these is an insulator? (a) a steel coin (b) a copper wire (c) a ceramic cup (d) a steel spoon
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
34. 34.Which of these is an insulator? (a) a brass key (b) a steel spoon (c) a copper wire (d) a dry cork
35. 35.🔦 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 woollen thread. Does the bulb glow? (a) Yes (b) No
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) Yes (b) No
37. 37.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it is just untidy (c) water carries current (d) it spoils the paint
38. 38.True or false: a push button stays where you flip it. (a) True (b) False
39. 39.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
40. 40.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed

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