Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 205 · 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 is safe? (a) use a cable with cuts (b) use mains for a project (c) dry your hands first (d) touch a fallen wire
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.⚡ What does an exhaust fan mainly change electricity into? (a) light (b) heat (c) movement (d) sound
4. 4.True or false: to touch a fallen wire is not safe. (a) True (b) False
5. 5.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
6. 6.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
7. 7.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) one out, the rest glow (d) a single current path
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the shorter line (d) the longer line
9. 9.Which drawing is the symbol for a switch? (a) a circle with A inside (b) two equal parallel lines (c) a line lifted at a gap (d) many long-short pairs
10. 10.🔍 Which is the odd one out? (a) use a cable with cuts (b) build with an adult near (c) throw cells in a fire (d) use mains for a project
11. 11.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
12. 12.Which of these uses electricity? (a) a cell (b) a battery (c) a mobile phone (d) a solar panel
13. 13.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) voltmeter (b) LED (c) resistor (d) battery
14. 14.⚡ What does an electric drill mainly change electricity into? (a) light (b) sound (c) heat (d) movement
15. 15.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
16. 16.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) changes the voltage (c) makes electricity (d) stores current
17. 17.Which of these is an insulator? (a) a copper wire (b) a safety pin (c) a plastic straw (d) a brass key
18. 18.🔍 Which is the odd one out? (a) a safety pin (b) a graphite rod (c) a rubber band (d) a steel spoon
19. 19.True or false: triangle against a bar is the symbol for a battery. (a) True (b) False
20. 20.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
21. 21.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) an inverter socket (d) a small battery pack
22. 22.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
23. 23.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
24. 24.True or false: to touch a switch when wet is safe. (a) True (b) False
25. 25.True or false: a long and a short line is the symbol for a battery. (a) False (b) True
26. 26.True or false: a long and a short line is the symbol for a cell. (a) True (b) False
27. 27.⚡ What does a street light mainly change electricity into? (a) sound (b) movement (c) heat (d) light
28. 28.True or false: a slide switch flips up or down. (a) False (b) True
29. 29.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) wavy lines (d) straight lines
30. 30.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.Which of these means the circuit is open? (a) the loop is complete (b) a cell is taken out (c) all wires are joined (d) the switch is ON
32. 32.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
33. 33.⚡ What does a torch mainly change electricity into? (a) sound (b) light (c) heat (d) movement
34. 34.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) cell (b) bulb (c) battery (d) switch
35. 35.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) when both are OFF (c) when either is ON (d) never
36. 36.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) junction (b) wire (c) bulb (d) battery
37. 37.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
38. 38.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
39. 39.Which of these is an insulator? (a) a steel spoon (b) a wooden stick (c) an iron nail (d) aluminium foil
40. 40.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) a smaller voltage (c) no voltage (d) the same voltage

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