Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 698 · 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) an iron nail (b) a safety pin (c) aluminium foil (d) a glass marble
2. 2.Which of these mainly makes sound? (a) a rice cooker (b) a night lamp (c) a water heater (d) a buzzer
3. 3.Which drawing is the symbol for an LED? (a) two or more cell symbols (b) triangle against a bar (c) triangle, bar and arrows (d) a long and a short line
4. 4.Which of these mainly gives out heat? (a) an electric drill (b) a rice cooker (c) an exhaust fan (d) an electric toy car
5. 5.True or false: “a single current path” is true of a series circuit. (a) True (b) False
6. 6.🔌 Most metals are good … (a) magnets only (b) batteries (c) conductors (d) insulators
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they all go out (d) they explode
8. 8.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
9. 9.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
10. 10.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
11. 11.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
12. 12.Which of these is not safe? (a) use small battery cells (b) keep drinks far away (c) build with an adult near (d) touch a fallen wire
13. 13.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
14. 14.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
15. 15.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
17. 17.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
18. 18.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) a cell is taken out (d) the switch is ON
19. 19.What does a slide switch do? (a) stays where you flip it (b) works only while pressed (c) slides side to side (d) flips up or down
20. 20.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a mains extension board (d) a small battery pack
21. 21.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
23. 23.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
25. 25.What does a tilt switch do? (a) springs back when let go (b) closes near a magnet (c) closes when tipped over (d) stays where you flip it
26. 26.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
27. 27.True or false: to open a phone charger is not safe. (a) False (b) True
28. 28.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
29. 29.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
30. 30.Which drawing is the symbol for a switch? (a) a circle with M inside (b) a circle with V inside (c) a circle with an X in it (d) a line lifted at a gap
31. 31.True or false: to touch a switch when wet is safe. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) an electric kettle (b) a siren (c) a loudspeaker (d) a buzzer
33. 33.⚡ What does a siren mainly change electricity into? (a) sound (b) light (c) heat (d) movement
34. 34.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) makes electricity (d) stores current
35. 35.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
36. 36.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.🔋 5 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
38. 38.Which of these is an insulator? (a) a steel spoon (b) a rubber band (c) aluminium foil (d) a brass key
39. 39.⚡ What does a buzzer mainly change electricity into? (a) heat (b) light (c) movement (d) sound
40. 40.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) two or more cells joined (d) one single wire

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