Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 412 · 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.🔋 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)? =
2. 2.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
3. 3.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) double the voltage (d) half the voltage
4. 4.Which drawing is the symbol for an ammeter? (a) two or more cell symbols (b) a line lifted at a gap (c) a circle with an X in it (d) a circle with A inside
5. 5.True or false: “a single current path” is true of a series circuit. (a) True (b) False
6. 6.True or false: a line lifted at a gap is the symbol for an ammeter. (a) False (b) True
7. 7.True or false: an exhaust fan mainly makes sound. (a) False (b) True
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) No (b) Yes
9. 9.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one for each bulb (d) one
10. 10.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
11. 11.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) movement energy (d) light energy
12. 12.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
13. 13.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) an inverter socket (d) a mains extension board
14. 14.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
15. 15.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) switch (b) battery (c) ammeter (d) cell
16. 16.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a switch with a lid (d) a kind of bulb
17. 17.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
18. 18.🔦 A circuit has a new cell, a bulb with a broken filament 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
19. 19.🔍 Which is the odd one out? (a) a toaster (b) a siren (c) a rice cooker (d) a water heater
20. 20.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
21. 21.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
22. 22.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) wire (b) resistor (c) motor (d) ammeter
23. 23.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
24. 24.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a push button (c) a tilt switch (d) a slide switch
25. 25.True or false: to poke things in a socket is not safe. (a) False (b) True
26. 26.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
28. 28.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) a break stops every bulb (d) own switch for each bulb
29. 29.🔍 Which is the odd one out? (a) stay away from pylons (b) open a phone charger (c) touch a switch when wet (d) use a cable with cuts
30. 30.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
31. 31.🔘 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) No (b) Yes
32. 32.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
33. 33.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) ammeter (b) LED (c) battery (d) bulb
34. 34.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
35. 35.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.Which of these gives us electricity? (a) a water pump (b) a television (c) a bicycle dynamo (d) a mobile phone
37. 37.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) glass (d) plastic
38. 38.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
39. 39.Which of these gives us electricity? (a) a washing machine (b) a mobile phone (c) a power station (d) a television
40. 40.Which of these is an insulator? (a) a rubber eraser (b) a steel coin (c) a steel spoon (d) a metal paper clip

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