Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 850 · 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 mixer grinder mainly gives out light. (a) True (b) False
2. 2.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) electric current (d) friction
3. 3.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
4. 4.True or false: a line lifted at a gap is the symbol for a junction. (a) False (b) True
5. 5.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
6. 6.💡 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) brighter (c) the same
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
8. 8.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
9. 9.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a bulb (c) a long wire (d) a plug top
10. 10.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
11. 11.🔋 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)? =
12. 12.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
13. 13.Which drawing is the symbol for a cell? (a) triangle, bar and arrows (b) a long and a short line (c) many long-short pairs (d) a circle with a cross
14. 14.Which of these is not safe? (a) stop if a part gets hot (b) stay away from pylons (c) touch a switch when wet (d) build with an adult near
15. 15.Which of these mainly gives out heat? (a) a tube light (b) a night lamp (c) an electric iron (d) an electric drill
16. 16.Which of these mainly makes movement? (a) a ceiling fan (b) a traffic signal (c) a buzzer (d) a loudspeaker
17. 17.True or false: a buzzer mainly makes sound. (a) False (b) True
18. 18.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
19. 19.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
20. 20.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
21. 21.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire is cut
22. 22.💡 4 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
23. 23.True or false: triangle, bar and arrows is the symbol for a junction. (a) True (b) False
24. 24.True or false: a circle with a cross is the symbol for a motor. (a) True (b) False
25. 25.💡 5 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. Does bulb 2 glow? (a) Yes (b) No
26. 26.💡 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
27. 27.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the switch (c) the glass (d) the base
28. 28.🔘 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) Yes (b) No
29. 29.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
30. 30.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
31. 31.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
32. 32.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) to make them heavy (d) plastic is an insulator
33. 33.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
34. 34.True or false: a toggle switch closes when tipped over. (a) False (b) True
35. 35.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) the same voltage (d) no voltage
36. 36.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) straight lines (d) little stars
37. 37.Which drawing is the symbol for a cell? (a) a circle with a cross (b) a plain rectangle (c) one tall, one short bar (d) a line lifted at a gap
38. 38.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
39. 39.⚡ What does a school bell mainly change electricity into? (a) light (b) movement (c) heat (d) sound
40. 40.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False

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