Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 30 · 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.Which of these gives us electricity? (a) a washing machine (b) a mobile phone (c) a power station (d) a computer
2. 2.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 15 V (c) 230 V (d) 0.5 V
3. 3.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
4. 4.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) bulbs share the voltage (d) many paths for current
5. 5.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) resistor (b) junction (c) motor (d) battery
6. 6.Which of these is safe? (a) poke things in a socket (b) keep drinks far away (c) use a cable with cuts (d) climb an electric pole
7. 7.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a trusted adult (d) a stranger online
8. 8.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) a single current path (d) one out, the rest glow
9. 9.🔦 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 steel coin. Does the bulb glow? (a) No (b) Yes
10. 10.Which of these is safe? (a) stop if a part gets hot (b) open a phone charger (c) touch a switch when wet (d) throw cells in a fire
11. 11.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
12. 12.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) a complete loop (d) one loose end
13. 13.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
14. 14.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.Which drawing is the symbol for a wire? (a) a long and a short line (b) a line lifted at a gap (c) a straight line (d) triangle against a bar
16. 16.Which of these mainly makes sound? (a) an electric iron (b) an electric kettle (c) a doorbell (d) a night lamp
17. 17.True or false: triangle, bar and arrows is the symbol for a cell. (a) False (b) True
18. 18.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) water makes it cold (c) it is just untidy (d) it spoils the paint
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
20. 20.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) a break stops every bulb (d) many paths for current
21. 21.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
22. 22.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
23. 23.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.🔍 Which is the odd one out? (a) a ceiling fan (b) a school bell (c) a buzzer (d) a loudspeaker
25. 25.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
26. 26.🔋 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)? =
27. 27.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
28. 28.True or false: a circle with V inside is the symbol for a cell. (a) False (b) True
29. 29.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the steel shaft (d) the plastic handle
30. 30.True or false: a dot where wires meet is the symbol for an LED. (a) False (b) True
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.True or false: a school bell mainly makes sound. (a) True (b) False
33. 33.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a push button
34. 34.⚡ What does a school bell mainly change electricity into? (a) movement (b) light (c) sound (d) heat
35. 35.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
36. 36.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
37. 37.💡 4 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 2 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
38. 38.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) quick and clear for all (d) to make it colourful
39. 39.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
40. 40.Which of these gives us electricity? (a) a washing machine (b) a computer (c) a wind turbine (d) a water pump

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