Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 146 · 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 is the odd one out? (a) use small battery cells (b) stop if a part gets hot (c) use mains for a project (d) fly kites in open fields
2. 2.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the longer line (d) the shorter line
3. 3.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) changes the voltage (d) opens or closes the loop
4. 4.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
5. 5.🔋 Does an air conditioner give electricity or use electricity? (a) gives electricity (b) uses electricity
6. 6.Which drawing is the symbol for a battery? (a) a circle with an X in it (b) many long-short pairs (c) a plain rectangle (d) a straight line
7. 7.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a bigger voltage (c) no voltage (d) a smaller voltage
8. 8.True or false: a mixer grinder mainly makes movement. (a) False (b) True
9. 9.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
10. 10.Which of these is an insulator? (a) a plastic straw (b) a copper wire (c) aluminium foil (d) an iron nail
11. 11.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the switch (c) the filament (d) the glass
12. 12.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) wire (b) switch (c) battery (d) junction
13. 13.Which of these uses electricity? (a) a wind turbine (b) a battery (c) a solar panel (d) a computer
14. 14.🔍 Which is the odd one out? (a) a plastic straw (b) a ceramic cup (c) an iron nail (d) a wooden stick
15. 15.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a stranger online (c) nobody (d) a trusted adult
16. 16.True or false: a line lifted at a gap is the symbol for a voltmeter. (a) True (b) False
17. 17.Which drawing is the symbol for a switch? (a) a circle with a cross (b) two equal parallel lines (c) a long and a short line (d) a line lifted at a gap
18. 18.Which of these is safe? (a) poke things in a socket (b) use a cable with cuts (c) throw cells in a fire (d) use small battery cells
19. 19.Which of these mainly gives out light? (a) a mixer grinder (b) an electric kettle (c) a street light (d) an exhaust fan
20. 20.⚡ What does an exhaust fan mainly change electricity into? (a) sound (b) heat (c) movement (d) light
21. 21.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
22. 22.⚡ What does a ceiling fan mainly change electricity into? (a) movement (b) light (c) heat (d) sound
23. 23.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) never (c) only when both are ON (d) when either is ON
24. 24.True or false: “a single current path” is true of a series circuit. (a) True (b) False
25. 25.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
26. 26.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
27. 27.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
28. 28.🔍 Which is the odd one out? (a) an iron nail (b) a copper wire (c) a rubber band (d) a brass key
29. 29.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
30. 30.🔍 Which is the odd one out? (a) a graphite rod (b) a metal paper clip (c) a glass marble (d) a copper wire
31. 31.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a safe circuit (c) an open circuit (d) a parallel circuit
32. 32.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) it is just untidy (c) water makes it cold (d) water carries current
33. 33.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
34. 34.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) one single wire (d) a switch with a lid
35. 35.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) to make them heavy (d) plastic is an insulator
36. 36.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
37. 37.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
38. 38.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
39. 39.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a tilt switch (c) a toggle switch (d) a reed switch
40. 40.🔦 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

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