Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 626 · 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.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
2. 2.🔦 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 graphite rod. Does the bulb glow? (a) Yes (b) No
3. 3.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
4. 4.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) quick and clear for all (d) to make it colourful
5. 5.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) switch (b) cell (c) diode (d) resistor
6. 6.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
7. 7.Which drawing is the symbol for a diode? (a) triangle against a bar (b) a circle with V inside (c) a plain rectangle (d) one tall, one short bar
8. 8.True or false: to throw cells in a fire is safe. (a) False (b) True
9. 9.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) own switch for each bulb (d) one bulb out, all go out
10. 10.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
11. 11.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) own switch for each bulb (d) a break stops every bulb
12. 12.🔍 Which is the odd one out? (a) climb an electric pole (b) use a cable with cuts (c) use mains for a project (d) use small battery cells
13. 13.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when both are ON (c) never (d) when either is ON
14. 14.True or false: a reed switch closes near a magnet. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) poke things in a socket (b) open a phone charger (c) fly a kite near wires (d) fly kites in open fields
16. 16.True or false: a toggle switch slides side to side. (a) True (b) False
17. 17.True or false: to take cells out after use is not safe. (a) True (b) False
18. 18.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
20. 20.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
22. 22.⚡ What does a street light mainly change electricity into? (a) heat (b) light (c) movement (d) sound
23. 23.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
24. 24.True or false: a toggle switch springs back when let go. (a) False (b) True
25. 25.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
26. 26.Which of these is a conductor? (a) a rubber eraser (b) a rubber band (c) a metal paper clip (d) a paper strip
27. 27.🔍 Which is the odd one out? (a) a traffic signal (b) a street light (c) a tube light (d) a ceiling fan
28. 28.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
30. 30.⚡ What does a toaster mainly change electricity into? (a) movement (b) sound (c) light (d) heat
31. 31.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
32. 32.True or false: two equal parallel lines is the symbol for a capacitor. (a) True (b) False
33. 33.Which of these means the circuit is open? (a) the switch is ON (b) a cell is taken out (c) the loop is complete (d) all wires are joined
34. 34.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
35. 35.🔌 Most metals are good … (a) insulators (b) conductors (c) magnets only (d) batteries
36. 36.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
37. 37.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
38. 38.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
39. 39.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
40. 40.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only

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