Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 424 · 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.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) a full circuit (d) an open circuit
2. 2.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
3. 3.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
4. 4.What does a reed switch do? (a) stays where you flip it (b) closes near a magnet (c) springs back when let go (d) slides side to side
5. 5.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the filament (d) the glass
6. 6.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) makes electricity (d) stores current
7. 7.⚡ What does an electric toy car mainly change electricity into? (a) sound (b) heat (c) movement (d) light
8. 8.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
9. 9.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) to hide the circuit (d) quick and clear for all
10. 10.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
11. 11.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
12. 12.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
13. 13.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a push button
14. 14.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) ammeter (b) bulb (c) switch (d) cell
15. 15.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
16. 16.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
17. 17.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
18. 18.Which of these gives us electricity? (a) a bicycle dynamo (b) a computer (c) a washing machine (d) a television
19. 19.🔍 Which is the odd one out? (a) a tube light (b) an electric toy car (c) a mixer grinder (d) an electric drill
20. 20.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are OFF (c) never (d) when both are ON
21. 21.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a reed switch (c) a toggle switch (d) a slide switch
22. 22.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
23. 23.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
24. 24.True or false: two or more cell symbols is the symbol for a cell. (a) True (b) False
25. 25.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
27. 27.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) cell (b) ammeter (c) bulb (d) resistor
28. 28.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
29. 29.⚡ What does a school bell mainly change electricity into? (a) light (b) heat (c) sound (d) movement
30. 30.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
31. 31.🔍 Which is the odd one out? (a) stop if a part gets hot (b) use small battery cells (c) dry your hands first (d) throw cells in a fire
32. 32.Which of these mainly gives out light? (a) a night lamp (b) an electric iron (c) a buzzer (d) a toaster
33. 33.💡 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 4 glow? (a) Yes (b) No
34. 34.🔋 2 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
35. 35.🔍 Which is the odd one out? (a) a school bell (b) a buzzer (c) a siren (d) a street light
36. 36.True or false: to keep drinks far away is not safe. (a) False (b) True
37. 37.Which of these mainly makes sound? (a) an LED lamp (b) a table fan (c) a siren (d) an electric iron
38. 38.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
39. 39.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) an open circuit (c) a short circuit (d) a parallel circuit
40. 40.True or false: triangle, bar and arrows is the symbol for a capacitor. (a) False (b) True

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids