Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 784 · 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.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.🔦 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
4. 4.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
5. 5.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
6. 6.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
7. 7.🔋 Does an air conditioner give electricity or use electricity? (a) gives electricity (b) uses electricity
8. 8.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
9. 9.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
10. 10.⚡ What does a siren mainly change electricity into? (a) heat (b) light (c) sound (d) movement
11. 11.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) the same voltage (d) double the voltage
12. 12.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) not joined (d) in parallel
13. 13.💡 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. Bulbs 1 and 2 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
14. 14.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water makes it cold (c) it spoils the paint (d) water carries current
15. 15.True or false: if the loop is complete, the circuit is closed and current flows. (a) False (b) True
16. 16.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.True or false: to dry your hands first is safe. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) aluminium foil (b) an iron nail (c) a steel coin (d) a ceramic cup
19. 19.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
21. 21.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
22. 22.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
23. 23.🔦 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 plastic straw. Does the bulb glow? (a) Yes (b) No
24. 24.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a circle with an X in it (c) one tall, one short bar (d) a straight line
25. 25.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
26. 26.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) both lines (d) the longer line
27. 27.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) electric current (c) a magnet (d) sound
28. 28.True or false: a cotton thread is a conductor. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) dry your hands first (b) take cells out after use (c) stay away from pylons (d) throw cells in a fire
30. 30.💡 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?
31. 31.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a stranger online (c) a younger child (d) nobody
33. 33.🔍 Which is the odd one out? (a) an electric drill (b) an exhaust fan (c) a ceiling fan (d) a loudspeaker
34. 34.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
35. 35.Which of these means the circuit is closed? (a) a wire has come loose (b) a cell is taken out (c) a wire is cut (d) all wires are joined
36. 36.Which of these is not safe? (a) touch a fallen wire (b) build with an adult near (c) stop if a part gets hot (d) use small battery cells
37. 37.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
38. 38.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
39. 39.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) wire (b) switch (c) ammeter (d) battery
40. 40.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) used in house wiring (d) bulbs share the voltage

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