Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 726 · 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.🔋 7 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
2. 2.True or false: to fly a kite near wires is safe. (a) True (b) False
3. 3.🔋 2 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
4. 4.True or false: an electric toy car mainly gives out light. (a) True (b) False
5. 5.Which of these is not safe? (a) use small battery cells (b) open a phone charger (c) keep drinks far away (d) stop if a part gets hot
6. 6.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to make it colourful (c) symbols are heavier (d) to hide the circuit
7. 7.Which of these is a conductor? (a) a dry cork (b) a plastic straw (c) a brass key (d) a ceramic cup
8. 8.💡 2 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. Bulb 1 is taken out of its holder. How many bulbs glow?
9. 9.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
10. 10.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
11. 11.🔍 Which is the odd one out? (a) a steel coin (b) aluminium foil (c) an iron nail (d) a wooden stick
12. 12.🔍 Which is the odd one out? (a) a plastic ruler (b) a ceramic cup (c) a copper wire (d) a rubber band
13. 13.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
14. 14.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
15. 15.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) switch (b) resistor (c) voltmeter (d) junction
17. 17.Which of these mainly gives out light? (a) a doorbell (b) a traffic signal (c) an electric kettle (d) a table fan
18. 18.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
19. 19.🔋 How many 2 V cells must be joined in series to give 8 V?
20. 20.⚡ What does a water heater mainly change electricity into? (a) heat (b) movement (c) light (d) sound
21. 21.🔘 When a switch is ON, the circuit is … (a) broken (b) closed (c) open (d) cut
22. 22.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
23. 23.True or false: triangle, bar and arrows is the symbol for an LED. (a) True (b) False
24. 24.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
25. 25.💡 4 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 2 and 3 are taken out of their holders. How many bulbs glow?
26. 26.Which of these gives us electricity? (a) a computer (b) a generator (c) an air conditioner (d) a washing machine
27. 27.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
28. 28.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
29. 29.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
30. 30.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
31. 31.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
32. 32.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
33. 33.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
34. 34.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) many paths for current (c) one bulb out, all go out (d) a single current path
35. 35.True or false: a loudspeaker mainly makes sound. (a) False (b) True
36. 36.True or false: a circle with a cross is the symbol for a junction. (a) False (b) True
37. 37.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
38. 38.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
39. 39.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
40. 40.💡 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. How many bulbs glow?

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