Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 673 · 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.Which of these gives us electricity? (a) a television (b) a solar panel (c) a refrigerator (d) a washing machine
2. 2.True or false: a cotton thread is an insulator. (a) False (b) True
3. 3.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) bulb (b) switch (c) cell (d) ammeter
4. 4.Which of these is not safe? (a) build with an adult near (b) dry your hands first (c) stay away from pylons (d) climb an electric pole
5. 5.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
6. 6.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) capacitor (b) battery (c) ammeter (d) bulb
7. 7.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
8. 8.🔋 3 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)? =
9. 9.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
10. 10.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) bury them in soil (d) cut them open
12. 12.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one for each bulb (d) one
13. 13.🔘 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 OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
14. 14.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
15. 15.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
16. 16.⚡ What does a torch mainly change electricity into? (a) movement (b) sound (c) heat (d) light
17. 17.🔍 Which is the odd one out? (a) a rice cooker (b) a siren (c) an electric iron (d) an electric kettle
18. 18.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) by Wi-Fi (d) in parallel
19. 19.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
20. 20.💡 A battery lights 5 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
21. 21.True or false: a toaster mainly makes movement. (a) False (b) True
22. 22.Which of these uses electricity? (a) a cell (b) a television (c) a power station (d) a solar panel
23. 23.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) plastic is an insulator (d) to make them heavy
24. 24.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) cell (b) voltmeter (c) ammeter (d) bulb
25. 25.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) each gets the full volts (c) one bulb out, all go out (d) a single current path
26. 26.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
28. 28.⚡ What does a toaster mainly change electricity into? (a) sound (b) heat (c) light (d) movement
29. 29.True or false: a push button flips up or down. (a) True (b) False
30. 30.Which of these is not safe? (a) touch a fallen wire (b) dry your hands first (c) take cells out after use (d) use small battery cells
31. 31.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a brass key (b) a copper wire (c) a plastic ruler (d) a steel coin
33. 33.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
34. 34.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) a cell (d) an insulator
35. 35.🔍 Which is the odd one out? (a) a toaster (b) an electric iron (c) a ceiling fan (d) an electric kettle
36. 36.Which drawing is the symbol for a motor? (a) a line lifted at a gap (b) a dot where wires meet (c) many long-short pairs (d) a circle with M inside
37. 37.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
38. 38.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
39. 39.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =

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