Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 759 · 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.🔋 5 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 series circuit, how many paths does the current have? (a) one (b) none (c) two (d) one for each bulb
3. 3.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a toggle switch
4. 4.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
5. 5.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
6. 6.✏️ 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
7. 7.Which of these mainly gives out heat? (a) a ceiling fan (b) a torch (c) an electric kettle (d) a street light
8. 8.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
9. 9.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a complete loop (d) a plastic gap
10. 10.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
11. 11.True or false: a circle with a cross is the symbol for a cell. (a) True (b) False
12. 12.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
13. 13.🔦 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 metal paper clip. Does the bulb glow? (a) Yes (b) No
14. 14.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
15. 15.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) many paths for current (d) bulbs share the voltage
16. 16.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) neither line (d) the shorter line
17. 17.💡 6 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. Bulbs 1 and 6 are taken out of their holders. How many bulbs glow?
18. 18.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
19. 19.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
20. 20.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a toggle switch (c) a push button (d) a tilt switch
21. 21.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
22. 22.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
23. 23.🔋 What should you do with used-up cells? (a) cut them open (b) throw them in a fire (c) bury them in soil (d) give them for recycling
24. 24.🔋 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)? =
25. 25.What does a reed switch do? (a) flips up or down (b) slides side to side (c) springs back when let go (d) closes near a magnet
26. 26.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when both are ON (c) when either is ON (d) never
27. 27.🔦 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 glass marble. Does the bulb glow? (a) Yes (b) No
28. 28.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
29. 29.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) not joined (d) by Wi-Fi
30. 30.🔍 Which is the odd one out? (a) take cells out after use (b) poke things in a socket (c) fly a kite near wires (d) touch a switch when wet
31. 31.⚡ What does a water heater mainly change electricity into? (a) sound (b) light (c) movement (d) heat
32. 32.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
33. 33.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
34. 34.Which of these mainly makes movement? (a) an electric kettle (b) an electric iron (c) a water heater (d) a mixer grinder
35. 35.🔍 Which is the odd one out? (a) a ceramic cup (b) a metal paper clip (c) an iron nail (d) a steel spoon
36. 36.🔘 Which kind of switch works only while pressed? (a) a push button (b) a toggle switch (c) a reed switch (d) a tilt switch
37. 37.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
38. 38.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
39. 39.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
40. 40.Which of these mainly gives out light? (a) a street light (b) a ceiling fan (c) an electric kettle (d) a toaster

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