Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 134 · 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.🔋 6 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)? =
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they get dimmer (d) they keep glowing
3. 3.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
4. 4.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
5. 5.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a slide switch (c) a push button (d) a tilt switch
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) none (d) both of them
7. 7.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
8. 8.🔋 5 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
9. 9.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) a smaller voltage (d) the same voltage
10. 10.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) a cell is taken out (d) the switch is ON
11. 11.True or false: a plastic ruler is a conductor. (a) False (b) True
12. 12.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
13. 13.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
14. 14.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) own switch for each bulb (d) one bulb out, all go out
15. 15.🔋 How many 3 V cells must be joined in series to give 6 V?
16. 16.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) bulbs share the voltage (d) own switch for each bulb
17. 17.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
18. 18.💡 4 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
19. 19.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
20. 20.True or false: to stop if a part gets hot is not safe. (a) True (b) False
21. 21.⚡ What does an electric kettle mainly change electricity into? (a) light (b) movement (c) sound (d) heat
22. 22.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
23. 23.Which of these mainly gives out light? (a) a rice cooker (b) a room heater (c) an electric drill (d) a tube light
24. 24.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
25. 25.What does a toggle switch do? (a) closes near a magnet (b) works only while pressed (c) stays where you flip it (d) slides side to side
26. 26.True or false: a reed switch closes near a magnet. (a) True (b) False
27. 27.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. 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
28. 28.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
29. 29.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) a magnet (c) friction (d) electric current
30. 30.Which of these mainly gives out heat? (a) a table fan (b) a traffic signal (c) a room heater (d) a torch
31. 31.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
32. 32.Which of these is a conductor? (a) a paper strip (b) a ceramic cup (c) an iron nail (d) a plastic straw
33. 33.True or false: a push button closes when tipped over. (a) True (b) False
34. 34.⚡ What does a rice cooker mainly change electricity into? (a) movement (b) sound (c) light (d) heat
35. 35.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a push button (c) a slide switch (d) a toggle switch
36. 36.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) photons (c) electrons (d) dust particles
37. 37.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
38. 38.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) a long and a short line (c) two or more cell symbols (d) a circle with A inside
39. 39.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
40. 40.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) water makes it cold (c) it spoils the paint (d) it is just untidy

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