Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 262 · 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: a plastic ruler is an insulator. (a) False (b) True
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.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) one bulb out, all go out (d) one out, the rest glow
4. 4.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) never (c) only when both are ON (d) only when both are OFF
5. 5.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
6. 6.💡 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
7. 7.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
8. 8.🔍 Which is the odd one out? (a) a metal paper clip (b) a paper strip (c) a rubber eraser (d) a glass marble
9. 9.Which of these is not safe? (a) fly kites in open fields (b) stay away from pylons (c) build with an adult near (d) use a cable with cuts
10. 10.Which of these is not safe? (a) fly kites in open fields (b) build with an adult near (c) dry your hands first (d) climb an electric pole
11. 11.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
12. 12.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) a switch with a lid (d) two or more cells joined
13. 13.Which drawing is the symbol for a cell? (a) a circle with M inside (b) one tall, one short bar (c) a straight line (d) a dot where wires meet
14. 14.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
15. 15.Which of these is safe? (a) touch a fallen wire (b) dry your hands first (c) use a cable with cuts (d) touch a switch when wet
16. 16.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a complete loop (d) a plastic gap
17. 17.⚡ What does a school bell mainly change electricity into? (a) movement (b) heat (c) light (d) sound
18. 18.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) a cell is taken out (d) the loop is complete
19. 19.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
20. 20.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is OFF (c) a wire is cut (d) all wires are joined
21. 21.True or false: a brass key is an insulator. (a) False (b) True
22. 22.True or false: a street light mainly makes movement. (a) True (b) False
23. 23.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
24. 24.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
25. 25.True or false: a plain rectangle is the symbol for an LED. (a) True (b) False
26. 26.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a closed circuit (c) a full circuit (d) a series circuit
27. 27.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) cell (c) bulb (d) battery
28. 28.🔦 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
29. 29.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
30. 30.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
32. 32.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
33. 33.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.🔍 Which is the odd one out? (a) a room heater (b) an electric iron (c) an electric toy car (d) a water heater
36. 36.Which of these is safe? (a) build with an adult near (b) use mains for a project (c) open a phone charger (d) throw cells in a fire
37. 37.What does a toggle switch do? (a) slides side to side (b) works only while pressed (c) closes near a magnet (d) flips up or down
38. 38.🔋 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)? =
39. 39.🔍 Which is the odd one out? (a) an iron nail (b) a woollen thread (c) a ceramic cup (d) a rubber band
40. 40.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity

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