Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 812 · 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.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
2. 2.Which of these is an insulator? (a) a steel spoon (b) a plastic ruler (c) a copper wire (d) an iron nail
3. 3.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a toggle switch (c) a push button (d) a tilt switch
4. 4.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
5. 5.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) a complete loop (d) one loose end
6. 6.True or false: a brass key is a conductor. (a) False (b) True
7. 7.Which of these uses electricity? (a) a power station (b) a solar panel (c) an air conditioner (d) a generator
8. 8.💡 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
9. 9.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) movement energy (c) sound energy (d) chemical energy
10. 10.Which of these is an insulator? (a) a brass key (b) a dry cork (c) a metal paper clip (d) a copper wire
11. 11.🔍 Which is the odd one out? (a) an iron nail (b) a rubber eraser (c) a steel coin (d) a safety pin
12. 12.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic ruler (c) a metal paper clip (d) a wooden stick
14. 14.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a tilt switch (c) a toggle switch (d) a reed switch
15. 15.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) an open circuit (d) a series circuit
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 ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
17. 17.🔦 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 steel spoon. Does the bulb glow? (a) Yes (b) No
18. 18.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) a single current path (d) many paths for current
19. 19.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
20. 20.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
21. 21.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
22. 22.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) a mains extension board (d) an inverter socket
23. 23.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
24. 24.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
25. 25.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
26. 26.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
27. 27.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
28. 28.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
29. 29.🔋 Does a power station give electricity or use electricity? (a) gives electricity (b) uses electricity
30. 30.True or false: a tilt switch flips up or down. (a) True (b) False
31. 31.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) motor (b) capacitor (c) wire (d) battery
32. 32.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
33. 33.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
34. 34.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) only when both are ON (d) when either is ON
35. 35.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
36. 36.Which of these is not safe? (a) dry your hands first (b) open a phone charger (c) stay away from pylons (d) stop if a part gets hot
37. 37.Which of these uses electricity? (a) a power station (b) a battery (c) a mobile phone (d) a bicycle dynamo
38. 38.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
39. 39.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
40. 40.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a younger child (c) a trusted adult (d) nobody

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