Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 530 · 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 is the odd one out? (a) climb an electric pole (b) use a cable with cuts (c) take cells out after use (d) open a phone charger
2. 2.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
3. 3.⚡ What does a street light mainly change electricity into? (a) light (b) heat (c) movement (d) sound
4. 4.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) Yes (b) No
5. 5.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
7. 7.True or false: a traffic signal mainly gives out light. (a) True (b) False
8. 8.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
9. 9.🔘 What does a switch do in a circuit? (a) stores current (b) makes electricity (c) opens or closes the loop (d) changes the voltage
10. 10.Which of these is true of a series circuit? (a) one bulb out, all go out (b) each gets the full volts (c) one out, the rest glow (d) many paths for current
11. 11.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
12. 12.Which of these mainly gives out light? (a) a siren (b) a water heater (c) a street light (d) a ceiling fan
13. 13.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
14. 14.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a copper wire. Does the bulb glow? (a) No (b) Yes
15. 15.Which of these is an insulator? (a) a graphite rod (b) aluminium foil (c) a glass marble (d) a steel spoon
16. 16.🔋 4 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
17. 17.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
18. 18.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
19. 19.True or false: “a single current path” is true of a series circuit. (a) False (b) True
20. 20.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) water carries current (d) it is just untidy
21. 21.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.💡 3 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?
23. 23.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) bury them in soil (d) give them for recycling
24. 24.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a metal paper clip. Does the bulb glow? (a) No (b) Yes
25. 25.True or false: a cotton thread is a conductor. (a) False (b) True
26. 26.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) plastic is an insulator (d) to make them heavy
27. 27.🔍 Which is the odd one out? (a) a safety pin (b) an iron nail (c) a copper wire (d) a glass marble
28. 28.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
29. 29.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
30. 30.⚡ What does a siren mainly change electricity into? (a) movement (b) sound (c) light (d) heat
31. 31.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
32. 32.True or false: to open a phone charger is safe. (a) True (b) False
33. 33.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
34. 34.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
35. 35.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
36. 36.Which of these mainly gives out light? (a) an exhaust fan (b) a buzzer (c) a ceiling fan (d) an LED lamp
37. 37.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
38. 38.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
39. 39.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
40. 40.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) sound energy (c) chemical energy (d) movement energy

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