Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 310 · 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.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
2. 2.Which of these mainly gives out light? (a) a rice cooker (b) an exhaust fan (c) a tube light (d) a doorbell
3. 3.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a toggle switch (c) a push button (d) a tilt switch
4. 4.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
5. 5.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
6. 6.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
7. 7.True or false: a traffic signal mainly makes movement. (a) True (b) False
8. 8.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are ON (c) when both are OFF (d) never
9. 9.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 1.5 V (d) 0.5 V
10. 10.🔍 Which is the odd one out? (a) use mains for a project (b) dry your hands first (c) poke things in a socket (d) open a phone charger
11. 11.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) one for each bulb (d) two
12. 12.⚡ What does an electric iron mainly change electricity into? (a) heat (b) movement (c) light (d) sound
13. 13.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
14. 14.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
15. 15.True or false: a wooden stick is a conductor. (a) True (b) False
16. 16.Which of these is safe? (a) build with an adult near (b) use a cable with cuts (c) touch a fallen wire (d) use mains for a project
17. 17.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
18. 18.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
19. 19.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
20. 20.Which of these is not safe? (a) use small battery cells (b) stop if a part gets hot (c) build with an adult near (d) touch a switch when wet
21. 21.What does a push button do? (a) slides side to side (b) closes near a magnet (c) works only while pressed (d) stays where you flip it
22. 22.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) a wall socket (c) an inverter socket (d) a mains extension board
23. 23.True or false: to stay away from pylons is not safe. (a) True (b) False
24. 24.🔦 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
25. 25.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
26. 26.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.What does a toggle switch do? (a) stays where you flip it (b) works only while pressed (c) closes near a magnet (d) springs back when let go
28. 28.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
30. 30.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
31. 31.Which of these mainly makes movement? (a) a mixer grinder (b) a night lamp (c) a torch (d) an electric kettle
32. 32.🔍 Which is the odd one out? (a) a plastic straw (b) an iron nail (c) a safety pin (d) a steel coin
33. 33.True or false: a mixer grinder mainly makes sound. (a) False (b) True
34. 34.True or false: a push button works only while pressed. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) touch a fallen wire (b) use mains for a project (c) use a cable with cuts (d) take cells out after use
36. 36.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
37. 37.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
38. 38.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
39. 39.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) a wire has come loose
40. 40.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper

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