Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 314 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
2. 2.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
3. 3.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
4. 4.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
5. 5.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) it is just untidy (d) water carries current
6. 6.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
7. 7.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
8. 8.🔍 Which is the odd one out? (a) use mains for a project (b) open a phone charger (c) stay away from pylons (d) poke things in a socket
9. 9.Which of these is a conductor? (a) a woollen thread (b) a rubber eraser (c) a ceramic cup (d) a copper wire
10. 10.🔘 When a switch is ON, the circuit is … (a) cut (b) open (c) closed (d) broken
11. 11.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
12. 12.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) electric current (c) a magnet (d) friction
13. 13.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
14. 14.🔍 Which is the odd one out? (a) use small battery cells (b) stay away from pylons (c) climb an electric pole (d) fly kites in open fields
15. 15.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
16. 16.⚡ What does a siren mainly change electricity into? (a) movement (b) heat (c) light (d) sound
17. 17.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) a bigger voltage (d) no voltage
18. 18.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) a plastic gap (d) one loose end
20. 20.💡 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. Does bulb 2 glow? (a) Yes (b) No
21. 21.Which of these mainly gives out heat? (a) a siren (b) a night lamp (c) an LED lamp (d) a toaster
22. 22.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) bulb (c) resistor (d) capacitor
24. 24.True or false: a night lamp mainly gives out heat. (a) True (b) False
25. 25.True or false: a tilt switch closes near a magnet. (a) True (b) False
26. 26.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
27. 27.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
28. 28.🔋 How many 1.5 V cells must be joined in series to give 3 V?
29. 29.Which drawing is the symbol for a battery? (a) a line lifted at a gap (b) a straight line (c) two or more cell symbols (d) a circle with A inside
30. 30.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) used in house wiring
31. 31.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a cell is taken out
32. 32.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly a kite near wires (c) climb an electric pole (d) open a phone charger
33. 33.True or false: a traffic signal mainly makes sound. (a) False (b) True
34. 34.Which drawing is the symbol for a bulb? (a) triangle against a bar (b) two or more cell symbols (c) a circle with an X in it (d) a circle with A inside
35. 35.True or false: a dry cork is a conductor. (a) False (b) True
36. 36.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the metal tip (d) the plastic handle
37. 37.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to hide the circuit (c) symbols are heavier (d) to make it colourful
39. 39.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
40. 40.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True

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