Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 543 · 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 drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a line lifted at a gap (c) a small empty box (d) a dot where wires meet
2. 2.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
3. 3.True or false: a traffic signal mainly makes movement. (a) True (b) False
4. 4.Which of these is not safe? (a) climb an electric pole (b) keep drinks far away (c) stop if a part gets hot (d) build with an adult near
5. 5.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
6. 6.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
7. 7.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.💡 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
9. 9.🔍 Which is the odd one out? (a) a steel coin (b) a metal paper clip (c) a dry cork (d) aluminium foil
10. 10.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) an insulator (d) a cell
11. 11.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
12. 12.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
13. 13.True or false: a brass key is an insulator. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) a cotton thread (b) a brass key (c) a woollen thread (d) a plastic straw
15. 15.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) light energy (d) sound energy
16. 16.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
17. 17.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
18. 18.Which drawing is the symbol for a bulb? (a) a circle with M inside (b) a circle with an X in it (c) triangle, bar and arrows (d) a circle with V inside
19. 19.🔍 Which is the odd one out? (a) a paper strip (b) an iron nail (c) a cotton thread (d) a plastic ruler
20. 20.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
21. 21.Which of these is an insulator? (a) a brass key (b) a cotton thread (c) a steel spoon (d) aluminium foil
22. 22.🔍 Which is the odd one out? (a) a safety pin (b) aluminium foil (c) a steel coin (d) a cotton thread
23. 23.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
24. 24.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
25. 25.Which of these means the circuit is open? (a) a wire is cut (b) the switch is ON (c) all wires are joined (d) the loop is complete
26. 26.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
27. 27.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
28. 28.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) wire (c) bulb (d) switch
29. 29.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a slide switch (c) a push button (d) a tilt switch
30. 30.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
31. 31.💡 5 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?
32. 32.Which of these is safe? (a) touch a switch when wet (b) climb an electric pole (c) fly kites in open fields (d) open a phone charger
33. 33.Which of these gives us electricity? (a) a television (b) a computer (c) a bicycle dynamo (d) a washing machine
34. 34.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) chemical energy (c) sound energy (d) light energy
35. 35.🔋 4 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)? =
36. 36.🔍 Which is the odd one out? (a) a woollen thread (b) a ceramic cup (c) a paper strip (d) a safety pin
37. 37.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
38. 38.Which drawing is the symbol for a diode? (a) triangle against a bar (b) two equal parallel lines (c) a long and a short line (d) a plain rectangle
39. 39.💡 3 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. How many bulbs glow?
40. 40.🔍 Which is the odd one out? (a) a siren (b) an exhaust fan (c) a ceiling fan (d) an electric toy car

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