Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 337 · 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.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
2. 2.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) photons (d) electrons
3. 3.🔘 What does a switch do in a circuit? (a) stores current (b) opens or closes the loop (c) makes electricity (d) changes the voltage
4. 4.💡 4 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
5. 5.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
6. 6.Which of these mainly makes movement? (a) a table fan (b) an electric iron (c) a loudspeaker (d) a buzzer
7. 7.💡 A battery lights 4 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
8. 8.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) one for each bulb (d) two
9. 9.True or false: a brass key is a conductor. (a) True (b) False
10. 10.Which of these mainly gives out light? (a) an electric iron (b) an electric toy car (c) a torch (d) a table fan
11. 11.🔦 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
12. 12.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) many paths for current (d) one bulb out, all go out
13. 13.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
14. 14.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
15. 15.Which of these mainly gives out heat? (a) a toaster (b) an electric toy car (c) a traffic signal (d) a torch
16. 16.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
17. 17.Which of these means the circuit is open? (a) a wire has come loose (b) all wires are joined (c) the loop is complete (d) the switch is ON
18. 18.Which of these is an insulator? (a) a steel spoon (b) a copper wire (c) a paper strip (d) a steel coin
19. 19.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) an open circuit (d) a full circuit
20. 20.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
21. 21.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
22. 22.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
23. 23.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) quick and clear for all (d) to make it colourful
24. 24.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) voltmeter (b) switch (c) LED (d) cell
25. 25.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
26. 26.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
27. 27.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
29. 29.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
30. 30.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) electric current (d) a magnet
31. 31.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) a switch with a lid (d) two or more cells joined
33. 33.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
34. 34.🔘 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 OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
35. 35.Which drawing is the symbol for a resistor? (a) a small empty box (b) a circle with a cross (c) triangle, bar and arrows (d) a circle with V inside
36. 36.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
37. 37.Which of these means the circuit is closed? (a) a wire is cut (b) a cell is taken out (c) the bulb is unscrewed (d) all wires are joined
38. 38.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
39. 39.💡 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
40. 40.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor

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