Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 60 · 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.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
2. 2.Which of these gives us electricity? (a) a refrigerator (b) a solar panel (c) a mobile phone (d) an air conditioner
3. 3.What does a toggle switch do? (a) slides side to side (b) works only while pressed (c) flips up or down (d) closes near a magnet
4. 4.True or false: an electric kettle mainly gives out heat. (a) False (b) True
5. 5.What does a reed switch do? (a) closes when tipped over (b) closes near a magnet (c) springs back when let go (d) stays where you flip it
6. 6.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
7. 7.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
8. 8.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a slide switch (c) a push button (d) a toggle switch
9. 9.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
10. 10.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
11. 11.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
12. 12.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
13. 13.Which of these means the circuit is closed? (a) a wire is cut (b) the switch is OFF (c) a cell is taken out (d) all wires are joined
14. 14.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.🔍 Which is the odd one out? (a) keep drinks far away (b) dry your hands first (c) build with an adult near (d) use a cable with cuts
18. 18.True or false: an electric iron mainly gives out light. (a) False (b) True
19. 19.⚠️ 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
20. 20.⚡ What does a street light mainly change electricity into? (a) sound (b) heat (c) movement (d) light
21. 21.True or false: to touch a fallen wire is not safe. (a) True (b) False
22. 22.Which of these is not safe? (a) use small battery cells (b) build with an adult near (c) climb an electric pole (d) stay away from pylons
23. 23.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
25. 25.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) plastic makes current (d) to make them heavy
27. 27.💡 6 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?
28. 28.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) No (b) Yes
29. 29.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a reed switch (c) a push button (d) a toggle switch
30. 30.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
31. 31.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.🔍 Which is the odd one out? (a) a school bell (b) a rice cooker (c) an electric iron (d) a toaster
33. 33.True or false: to open a phone charger is not safe. (a) True (b) False
34. 34.⚡ What does an LED lamp mainly change electricity into? (a) light (b) movement (c) heat (d) sound
35. 35.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
36. 36.True or false: a tilt switch springs back when let go. (a) True (b) False
37. 37.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) nobody (c) a trusted adult (d) a stranger online
38. 38.Which of these is safe? (a) open a phone charger (b) dry your hands first (c) fly a kite near wires (d) climb an electric pole
39. 39.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
40. 40.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed

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