Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 331 · 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: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
2. 2.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
3. 3.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
4. 4.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) friction (c) sound (d) a magnet
5. 5.Which of these mainly makes sound? (a) an electric kettle (b) a night lamp (c) a school bell (d) an LED lamp
6. 6.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) switch (c) voltmeter (d) motor
7. 7.💡 A battery lights 2 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
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) Yes (b) No
9. 9.💡 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?
10. 10.🔍 Which is the odd one out? (a) an electric kettle (b) a toaster (c) a water heater (d) a mixer grinder
11. 11.Which drawing is the symbol for an LED? (a) triangle against a bar (b) triangle, bar and arrows (c) many long-short pairs (d) a circle with M inside
12. 12.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
13. 13.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
14. 14.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) closed (d) cut
15. 15.Which drawing is the symbol for a voltmeter? (a) two or more cell symbols (b) a circle with an X in it (c) a circle with V inside (d) two equal parallel lines
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
18. 18.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when both are ON (d) when either is ON
19. 19.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
20. 20.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
21. 21.⚡ What does a toaster mainly change electricity into? (a) movement (b) heat (c) sound (d) light
22. 22.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 2 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) No (b) Yes
25. 25.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
26. 26.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) water drops (c) dust particles (d) photons
27. 27.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a short circuit (c) a safe circuit (d) a parallel circuit
29. 29.Which of these is safe? (a) poke things in a socket (b) fly a kite near wires (c) build with an adult near (d) use mains for a project
30. 30.True or false: a tube light mainly gives out light. (a) True (b) False
31. 31.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) straight lines (d) dotted circles
32. 32.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) junction (c) bulb (d) cell
33. 33.Which of these is an insulator? (a) a rubber band (b) a copper wire (c) aluminium foil (d) a metal paper clip
34. 34.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
35. 35.Which drawing is the symbol for a capacitor? (a) a circle with M inside (b) a circle with A inside (c) two equal parallel lines (d) one tall, one short bar
36. 36.💡 5 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. Does bulb 4 glow? (a) Yes (b) No
37. 37.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) many paths for current (d) one out, the rest glow
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
39. 39.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
40. 40.🔘 Which kind of switch flips up or down? (a) a push button (b) a slide switch (c) a tilt switch (d) a toggle switch

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