Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 520 · 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 true of a parallel circuit? (a) a break stops every bulb (b) one out, the rest glow (c) bulbs share the voltage (d) a single current path
2. 2.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
3. 3.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) a magnet (d) electric current
4. 4.Which of these mainly gives out heat? (a) an LED lamp (b) a loudspeaker (c) a water heater (d) a siren
5. 5.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) none (d) two
6. 6.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
7. 7.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
8. 8.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) throw them in a fire (d) cut them open
9. 9.Which of these is not safe? (a) use mains for a project (b) dry your hands first (c) stay away from pylons (d) build with an adult near
10. 10.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
11. 11.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) voltmeter (b) bulb (c) wire (d) capacitor
12. 12.Which of these is true of a series circuit? (a) one bulb out, all go out (b) each gets the full volts (c) own switch for each bulb (d) many paths for current
13. 13.🔍 Which is the odd one out? (a) a street light (b) a torch (c) a night lamp (d) a buzzer
14. 14.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.Which of these is safe? (a) open a phone charger (b) stop if a part gets hot (c) use mains for a project (d) touch a fallen wire
16. 16.🔍 Which is the odd one out? (a) stop if a part gets hot (b) throw cells in a fire (c) use a cable with cuts (d) climb an electric pole
17. 17.True or false: an LED lamp mainly makes movement. (a) True (b) False
18. 18.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) wait and watch (c) shout for an adult (d) pour water on them
19. 19.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
20. 20.Which of these is not safe? (a) fly kites in open fields (b) use small battery cells (c) poke things in a socket (d) keep drinks far away
21. 21.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
22. 22.Which of these means the circuit is open? (a) a cell is taken out (b) the loop is complete (c) the switch is ON (d) all wires are joined
23. 23.🔦 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
24. 24.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) half the voltage (d) the same voltage
25. 25.True or false: to touch a fallen wire is safe. (a) True (b) False
26. 26.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
27. 27.🔍 Which is the odd one out? (a) a plastic straw (b) a plastic ruler (c) a woollen thread (d) a metal paper clip
28. 28.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
29. 29.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
30. 30.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
31. 31.Which of these is safe? (a) climb an electric pole (b) take cells out after use (c) open a phone charger (d) throw cells in a fire
32. 32.🔍 Which is the odd one out? (a) a woollen thread (b) a copper wire (c) a brass key (d) an iron nail
33. 33.True or false: a straight line is the symbol for a wire. (a) True (b) False
34. 34.Which of these is safe? (a) throw cells in a fire (b) use mains for a project (c) fly kites in open fields (d) touch a switch when wet
35. 35.True or false: aluminium foil is an insulator. (a) True (b) False
36. 36.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
37. 37.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
38. 38.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) voltmeter (c) battery (d) wire
39. 39.💡 5 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. Does bulb 5 glow? (a) Yes (b) No
40. 40.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) heat (c) sound (d) light

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