Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 778 · 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 kind of switch springs back when let go? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a push button
2. 2.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
3. 3.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) a night lamp (b) a traffic signal (c) a buzzer (d) a street light
5. 5.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) each gets the full volts (d) a break stops every bulb
6. 6.🔍 Which is the odd one out? (a) a doorbell (b) a school bell (c) a traffic signal (d) a siren
7. 7.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it is just untidy (c) it spoils the paint (d) water makes it cold
8. 8.🔍 Which is the odd one out? (a) use small battery cells (b) climb an electric pole (c) dry your hands first (d) keep drinks far away
9. 9.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is a conductor (d) plastic is an insulator
10. 10.💡 3 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. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No
11. 11.True or false: a safety pin is a conductor. (a) False (b) True
12. 12.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
13. 13.Which of these is safe? (a) use mains for a project (b) dry your hands first (c) climb an electric pole (d) touch a switch when wet
14. 14.Which of these gives us electricity? (a) a computer (b) a washing machine (c) a wind turbine (d) an air conditioner
15. 15.True or false: a push button slides side to side. (a) True (b) False
16. 16.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a bulb (d) a long wire
17. 17.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) no voltage (d) double the voltage
19. 19.🔘 What does a switch do in a circuit? (a) stores current (b) makes electricity (c) changes the voltage (d) opens or closes the loop
20. 20.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
21. 21.Which of these means the circuit is open? (a) the loop is complete (b) the switch is OFF (c) all wires are joined (d) the switch is ON
22. 22.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) light (c) movement (d) heat
23. 23.🔍 Which is the odd one out? (a) build with an adult near (b) stay away from pylons (c) dry your hands first (d) touch a switch when wet
24. 24.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
25. 25.🔌 Which metal is used for most electric wires at home? (a) copper (b) plastic (c) glass (d) rubber
26. 26.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
28. 28.Which of these is a conductor? (a) an iron nail (b) a ceramic cup (c) a glass marble (d) a rubber band
29. 29.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
30. 30.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
31. 31.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
32. 32.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.🔍 Which is the odd one out? (a) touch a fallen wire (b) touch a switch when wet (c) use a cable with cuts (d) take cells out after use
34. 34.Which drawing is the symbol for an ammeter? (a) triangle, bar and arrows (b) a circle with A inside (c) a plain rectangle (d) a dot where wires meet
35. 35.Which of these mainly makes sound? (a) a school bell (b) a night lamp (c) an electric iron (d) an LED lamp
36. 36.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) sound (c) a magnet (d) electric current
37. 37.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
38. 38.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
39. 39.⚡ What does a night lamp mainly change electricity into? (a) movement (b) sound (c) heat (d) light
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No

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