Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 678 · 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.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
2. 2.True or false: to use a cable with cuts is safe. (a) True (b) False
3. 3.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
4. 4.Which of these means the circuit is closed? (a) a wire has come loose (b) a cell is taken out (c) the bulb is unscrewed (d) the loop is complete
5. 5.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
6. 6.🔌 Most metals are good … (a) magnets only (b) insulators (c) batteries (d) conductors
7. 7.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the filament (c) the base (d) the glass
8. 8.🔍 Which is the odd one out? (a) a rubber band (b) a safety pin (c) a graphite rod (d) a copper wire
9. 9.True or false: to use small battery cells is not safe. (a) True (b) False
10. 10.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) quick and clear for all (d) symbols are heavier
11. 11.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) when both are OFF (c) never (d) when either is ON
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 woollen thread. Does the bulb glow? (a) Yes (b) No
13. 13.What does a reed switch do? (a) flips up or down (b) closes near a magnet (c) springs back when let go (d) closes when tipped over
14. 14.True or false: a water heater mainly gives out heat. (a) True (b) False
15. 15.⚡ What does a ceiling fan mainly change electricity into? (a) movement (b) light (c) sound (d) heat
16. 16.Which of these uses electricity? (a) a television (b) a power station (c) a generator (d) a battery
17. 17.Which drawing is the symbol for a cell? (a) a small empty box (b) a circle with a cross (c) a long and a short line (d) a circle with an X in it
18. 18.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) two or more cells joined (d) one single wire
19. 19.Which drawing is the symbol for a voltmeter? (a) a plain rectangle (b) a circle with V inside (c) two or more cell symbols (d) a small empty box
20. 20.🔘 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 ON and C is OFF. Does the bulb glow? (a) No (b) Yes
21. 21.💡 A battery lights 3 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
22. 22.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
23. 23.Which of these gives us electricity? (a) a washing machine (b) a refrigerator (c) a computer (d) a generator
24. 24.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 A battery lights 5 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
26. 26.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) LED (c) voltmeter (d) cell
27. 27.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
28. 28.⚡ What does an electric drill mainly change electricity into? (a) movement (b) light (c) sound (d) heat
29. 29.Which drawing is the symbol for a junction? (a) triangle against a bar (b) a dot where wires meet (c) a circle with a cross (d) a small empty box
30. 30.🔦 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 graphite rod. Does the bulb glow? (a) Yes (b) No
31. 31.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
32. 32.Which of these is true of a series circuit? (a) used in house wiring (b) one bulb out, all go out (c) many paths for current (d) one out, the rest glow
33. 33.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
34. 34.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.🔘 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 OFF and B is ON. Does the bulb glow? (a) No (b) Yes
36. 36.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.True or false: a rubber eraser is a conductor. (a) False (b) True
38. 38.🔋 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)? =
39. 39.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
40. 40.🔍 Which is the odd one out? (a) build with an adult near (b) touch a switch when wet (c) dry your hands first (d) use small battery cells

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