Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 828 · 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.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
2. 2.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
3. 3.Which of these is safe? (a) poke things in a socket (b) touch a fallen wire (c) stop if a part gets hot (d) throw cells in a fire
4. 4.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
5. 5.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) many paths for current (d) each gets the full volts
6. 6.Which of these is safe? (a) climb an electric pole (b) stay away from pylons (c) use mains for a project (d) poke things in a socket
7. 7.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
8. 8.Which of these means the circuit is open? (a) a wire has come loose (b) the switch is ON (c) the loop is complete (d) all wires are joined
9. 9.True or false: a mixer grinder mainly makes movement. (a) True (b) False
10. 10.🔌 Which metal is used for most electric wires at home? (a) rubber (b) copper (c) plastic (d) glass
11. 11.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
12. 12.True or false: triangle, bar and arrows is the symbol for an LED. (a) True (b) False
13. 13.True or false: an electric kettle mainly makes sound. (a) True (b) False
14. 14.⚠️ 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
15. 15.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.⚡ What does a siren mainly change electricity into? (a) sound (b) movement (c) heat (d) light
17. 17.🔍 Which is the odd one out? (a) fly a kite near wires (b) fly kites in open fields (c) take cells out after use (d) stop if a part gets hot
18. 18.Which of these mainly makes sound? (a) an electric drill (b) a ceiling fan (c) a loudspeaker (d) a table fan
19. 19.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
20. 20.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
21. 21.Which of these is a conductor? (a) a paper strip (b) a steel coin (c) a cotton thread (d) a plastic straw
22. 22.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
23. 23.🔍 Which is the odd one out? (a) a safety pin (b) a copper wire (c) a ceramic cup (d) a steel spoon
24. 24.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the switch (c) the filament (d) the glass
25. 25.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
26. 26.Which of these is safe? (a) fly kites in open fields (b) use a cable with cuts (c) open a phone charger (d) use mains for a project
27. 27.Which of these means the circuit is closed? (a) a wire has come loose (b) all wires are joined (c) the switch is OFF (d) the bulb is unscrewed
28. 28.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
29. 29.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
30. 30.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 230 V (c) 12 V (d) 9 V
32. 32.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) only when both are OFF (c) when either is ON (d) never
33. 33.What does a push button do? (a) slides side to side (b) stays where you flip it (c) flips up or down (d) works only while pressed
34. 34.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
35. 35.Which drawing is the symbol for a diode? (a) a long and a short line (b) a circle with a cross (c) triangle against a bar (d) two equal parallel lines
36. 36.⚡ What does a rice cooker mainly change electricity into? (a) movement (b) sound (c) heat (d) light
37. 37.⚡ What does a torch mainly change electricity into? (a) light (b) heat (c) sound (d) movement
38. 38.💡 2 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
39. 39.🔍 Which is the odd one out? (a) use mains for a project (b) use a cable with cuts (c) poke things in a socket (d) stay away from pylons
40. 40.True or false: a circle with A inside is the symbol for an LED. (a) False (b) True

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