Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 402 · 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 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?
2. 2.🔦 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) Yes (b) No
3. 3.🔍 Which is the odd one out? (a) a plastic ruler (b) a safety pin (c) a woollen thread (d) a wooden stick
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) neither line (d) the longer line
5. 5.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) electrons (c) dust particles (d) water drops
6. 6.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
7. 7.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
8. 8.What does a push button do? (a) stays where you flip it (b) slides side to side (c) flips up or down (d) works only while pressed
9. 9.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
10. 10.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
11. 11.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
12. 12.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
13. 13.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
14. 14.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) switch (b) ammeter (c) cell (d) junction
15. 15.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) each gets the full volts (d) bulbs share the voltage
16. 16.🔘 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
17. 17.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) No (b) Yes
18. 18.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic is a conductor (d) plastic makes current
20. 20.True or false: many long-short pairs is the symbol for an ammeter. (a) True (b) False
21. 21.True or false: a steel coin is a conductor. (a) True (b) False
22. 22.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 9 V (c) 1.5 V (d) 12 V
23. 23.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
24. 24.True or false: a slide switch closes near a magnet. (a) True (b) False
25. 25.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a push button (c) a slide switch (d) a tilt switch
26. 26.🔍 Which is the odd one out? (a) climb an electric pole (b) poke things in a socket (c) dry your hands first (d) touch a fallen wire
27. 27.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) an electric kettle (b) a ceiling fan (c) an electric iron (d) a toaster
29. 29.True or false: to open a phone charger is not safe. (a) False (b) True
30. 30.Which of these gives us electricity? (a) an air conditioner (b) a mobile phone (c) a washing machine (d) a bicycle dynamo
31. 31.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) friction (c) a magnet (d) sound
33. 33.🔍 Which is the odd one out? (a) climb an electric pole (b) fly kites in open fields (c) use mains for a project (d) use a cable with cuts
34. 34.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
35. 35.Which of these mainly makes sound? (a) a traffic signal (b) a loudspeaker (c) an electric iron (d) a water heater
36. 36.🔋 6 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
37. 37.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) a switch that is ON (d) an insulator
38. 38.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
39. 39.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) water makes it cold (c) it spoils the paint (d) it is just untidy
40. 40.Which of these gives us electricity? (a) a television (b) a generator (c) an air conditioner (d) a computer

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids