Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 990 · 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.True or false: a water heater mainly gives out heat. (a) True (b) False
2. 2.Which of these is an insulator? (a) a wooden stick (b) a steel coin (c) aluminium foil (d) a safety pin
3. 3.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) No (b) Yes
4. 4.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
5. 5.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
6. 6.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
7. 7.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
8. 8.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
9. 9.💡 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 3 and 6 are taken out of their holders. How many bulbs glow?
10. 10.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they get dimmer (d) they all go out
11. 11.Which of these is true of a series circuit? (a) a single current path (b) used in house wiring (c) own switch for each bulb (d) many paths for current
12. 12.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it spoils the paint (c) water makes it cold (d) it is just untidy
13. 13.True or false: a long and a short line is the symbol for a capacitor. (a) True (b) False
14. 14.Which drawing is the symbol for a cell? (a) a circle with M inside (b) one tall, one short bar (c) a circle with an X in it (d) a circle with V inside
15. 15.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
16. 16.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) each gets the full volts (d) bulbs share the voltage
17. 17.True or false: one tall, one short bar is the symbol for a voltmeter. (a) True (b) False
18. 18.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) battery (b) LED (c) motor (d) switch
19. 19.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
20. 20.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) Yes (b) No
21. 21.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
22. 22.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) ammeter (b) battery (c) wire (d) cell
23. 23.Which of these is not safe? (a) use a cable with cuts (b) stay away from pylons (c) take cells out after use (d) keep drinks far away
24. 24.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
25. 25.True or false: a steel coin is an insulator. (a) False (b) True
26. 26.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a copper wire (d) a ceramic cup
27. 27.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
28. 28.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) to make them heavy (d) plastic makes current
29. 29.⚡ What does an electric drill mainly change electricity into? (a) heat (b) light (c) sound (d) movement
30. 30.Which of these means the circuit is open? (a) a wire has come loose (b) the loop is complete (c) all wires are joined (d) the switch is ON
31. 31.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
32. 32.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
33. 33.Which of these is safe? (a) take cells out after use (b) climb an electric pole (c) touch a switch when wet (d) touch a fallen wire
34. 34.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) one out, the rest glow (d) a break stops every bulb
35. 35.✏️ In a circuit diagram, which part is drawn as a straight line? (a) capacitor (b) diode (c) LED (d) wire
36. 36.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a push button
37. 37.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a stranger online (c) a younger child (d) nobody
38. 38.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.True or false: triangle against a bar is the symbol for a switch. (a) True (b) False

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