Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 659 · 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.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they keep glowing (d) they all go out
3. 3.🔋 How many 1.5 V cells must be joined in series to give 3 V?
4. 4.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
5. 5.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
6. 6.True or false: to touch a switch when wet is safe. (a) False (b) True
7. 7.Which of these mainly gives out light? (a) an electric toy car (b) a tube light (c) a water heater (d) a rice cooker
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in parallel (d) in series
9. 9.🔍 Which is the odd one out? (a) fly a kite near wires (b) stay away from pylons (c) use small battery cells (d) dry your hands first
10. 10.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
11. 11.🔋 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)? =
12. 12.True or false: a push button flips up or down. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) fly a kite near wires (b) use mains for a project (c) use small battery cells (d) touch a switch when wet
14. 14.Which of these uses electricity? (a) a refrigerator (b) a battery (c) a wind turbine (d) a cell
15. 15.💡 6 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. Does bulb 1 glow? (a) Yes (b) No
16. 16.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
17. 17.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
18. 18.True or false: if the loop is complete, the circuit is open and no current flows. (a) False (b) True
19. 19.Which of these is not safe? (a) use small battery cells (b) dry your hands first (c) build with an adult near (d) use a cable with cuts
20. 20.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) light energy (c) sound energy (d) movement energy
21. 21.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a mains extension board (d) a small battery pack
22. 22.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) to make it colourful (d) symbols are heavier
23. 23.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
24. 24.⚡ What does an electric drill mainly change electricity into? (a) sound (b) heat (c) light (d) movement
25. 25.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
27. 27.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.True or false: a table fan mainly makes movement. (a) False (b) True
29. 29.What does a reed switch do? (a) flips up or down (b) works only while pressed (c) closes near a magnet (d) stays where you flip it
30. 30.True or false: to open a phone charger is not safe. (a) False (b) True
31. 31.🔘 When a switch is ON, the circuit is … (a) broken (b) cut (c) open (d) closed
32. 32.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
33. 33.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the plastic handle (c) the metal tip (d) the bare end
34. 34.🔋 5 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)? =
35. 35.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
36. 36.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) wavy lines (d) little stars
37. 37.🔦 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) Yes (b) No
38. 38.True or false: a table fan mainly gives out heat. (a) True (b) False
39. 39.Which of these is an insulator? (a) a metal paper clip (b) a steel spoon (c) an iron nail (d) a plastic ruler
40. 40.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) changes the voltage (d) opens or closes the loop

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