Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 730 · 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 loudspeaker mainly makes sound. (a) True (b) False
2. 2.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a woollen thread. Does the bulb glow? (a) No (b) Yes
3. 3.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
4. 4.Which of these mainly gives out light? (a) a school bell (b) a loudspeaker (c) a street light (d) an electric kettle
5. 5.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) water carries current (d) it is just untidy
6. 6.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
7. 7.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) sound (c) light (d) movement
8. 8.Which drawing is the symbol for a switch? (a) a dot where wires meet (b) a circle with V inside (c) a small empty box (d) a line lifted at a gap
9. 9.🔌 Most metals are good … (a) insulators (b) conductors (c) batteries (d) magnets only
10. 10.Which of these mainly gives out light? (a) a water heater (b) a traffic signal (c) a siren (d) a toaster
11. 11.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) closed (d) cut
12. 12.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
14. 14.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
15. 15.True or false: to throw cells in a fire is not safe. (a) True (b) False
16. 16.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) a mains extension board (c) an inverter socket (d) a wall socket
17. 17.What does a push button do? (a) closes when tipped over (b) slides side to side (c) stays where you flip it (d) springs back when let go
18. 18.💡 A battery lights 3 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
19. 19.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
20. 20.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
21. 21.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) own switch for each bulb (d) bulbs share the voltage
22. 22.🔋 3 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)? =
23. 23.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
24. 24.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 2 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 1 is taken out of its holder. How many bulbs glow?
26. 26.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
29. 29.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
30. 30.🔍 Which is the odd one out? (a) open a phone charger (b) fly a kite near wires (c) take cells out after use (d) climb an electric pole
31. 31.True or false: a long and a short line is the symbol for a wire. (a) True (b) False
32. 32.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
33. 33.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
35. 35.Which of these mainly gives out light? (a) a tube light (b) a room heater (c) a ceiling fan (d) an electric iron
36. 36.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) wind energy
37. 37.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) Yes (b) No
38. 38.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
39. 39.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
40. 40.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series

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