Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 74 · 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 is a conductor? (a) a plastic ruler (b) a plastic straw (c) a steel spoon (d) a rubber band
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
3. 3.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
4. 4.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
5. 5.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) when either is ON (c) when both are OFF (d) never
6. 6.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
7. 7.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
8. 8.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
9. 9.💡 A battery lights 2 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
10. 10.What does a push button do? (a) slides side to side (b) closes when tipped over (c) closes near a magnet (d) works only while pressed
11. 11.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
12. 12.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
13. 13.True or false: a tilt switch works only while pressed. (a) True (b) False
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
15. 15.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
16. 16.Which of these mainly makes sound? (a) a table fan (b) an LED lamp (c) a school bell (d) a rice cooker
17. 17.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) two or more cells joined (d) one single wire
18. 18.💡 4 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
19. 19.Which of these means the circuit is open? (a) all wires are joined (b) the switch is OFF (c) the switch is ON (d) the loop is complete
20. 20.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) light (c) heat (d) movement
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) Yes (b) No
22. 22.🔍 Which is the odd one out? (a) take cells out after use (b) use small battery cells (c) use mains for a project (d) fly kites in open fields
23. 23.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a push button (c) a toggle switch (d) a slide switch
24. 24.Which of these mainly makes sound? (a) a buzzer (b) a night lamp (c) an electric kettle (d) an electric toy car
25. 25.What does a reed switch do? (a) closes near a magnet (b) slides side to side (c) works only while pressed (d) stays where you flip it
26. 26.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) cut (d) closed
27. 27.🔍 Which is the odd one out? (a) use a cable with cuts (b) open a phone charger (c) use mains for a project (d) build with an adult near
28. 28.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
29. 29.Which of these is safe? (a) touch a fallen wire (b) use mains for a project (c) take cells out after use (d) fly a kite near wires
30. 30.Which drawing is the symbol for a battery? (a) triangle against a bar (b) many long-short pairs (c) a circle with a cross (d) a circle with an X in it
31. 31.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
32. 32.Which of these is a conductor? (a) a dry cork (b) a woollen thread (c) aluminium foil (d) a paper strip
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) dotted circles (d) straight lines
34. 34.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) a wire has come loose
35. 35.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a short circuit (d) a safe circuit
36. 36.💡 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) brighter (c) dimmer
37. 37.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a push button (c) a toggle switch (d) a slide switch
38. 38.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) plastic is a conductor (d) to make them heavy
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.🔍 Which is the odd one out? (a) a doorbell (b) a torch (c) a street light (d) a tube light

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