Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 235 · 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 buzzer mainly gives out heat. (a) False (b) True
2. 2.True or false: a circle with V inside is the symbol for a voltmeter. (a) False (b) True
3. 3.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
4. 4.True or false: “a single current path” is true of a series circuit. (a) True (b) False
5. 5.🔋 8 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)? =
6. 6.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
7. 7.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
8. 8.Which of these means the circuit is open? (a) the bulb is unscrewed (b) all wires are joined (c) the switch is ON (d) the loop is complete
9. 9.🔋 How many 1.2 V cells must be joined in series to give 6 V?
10. 10.🔍 Which is the odd one out? (a) a metal paper clip (b) a plastic straw (c) a rubber band (d) a dry cork
11. 11.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
12. 12.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
13. 13.Which of these is safe? (a) use mains for a project (b) climb an electric pole (c) stop if a part gets hot (d) open a phone charger
14. 14.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
15. 15.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
16. 16.What does a slide switch do? (a) slides side to side (b) stays where you flip it (c) closes near a magnet (d) closes when tipped over
17. 17.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
18. 18.What does a reed switch do? (a) closes near a magnet (b) springs back when let go (c) closes when tipped over (d) stays where you flip it
19. 19.🔋 3 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)? =
20. 20.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
21. 21.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
22. 22.Which of these gives us electricity? (a) a washing machine (b) a refrigerator (c) a solar panel (d) a computer
23. 23.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
24. 24.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
25. 25.🔋 Does an air conditioner give electricity or use electricity? (a) gives electricity (b) uses electricity
26. 26.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
28. 28.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a push button (c) a toggle switch (d) a slide switch
29. 29.True or false: a table fan mainly gives out heat. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) stop if a part gets hot (b) climb an electric pole (c) keep drinks far away (d) dry your hands first
31. 31.🔋 4 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)? =
32. 32.Which of these is a conductor? (a) a rubber eraser (b) a safety pin (c) a plastic straw (d) a woollen thread
33. 33.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
34. 34.💡 A battery lights 2 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
35. 35.Which of these is safe? (a) touch a switch when wet (b) touch a fallen wire (c) build with an adult near (d) open a phone charger
36. 36.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
37. 37.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) heat (c) sound (d) light
38. 38.True or false: two equal parallel lines is the symbol for a junction. (a) True (b) False
39. 39.True or false: a reed switch closes when tipped over. (a) False (b) True
40. 40.Which of these is safe? (a) poke things in a socket (b) use small battery cells (c) use a cable with cuts (d) open a phone charger

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