Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 181 · 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.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
2. 2.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) a school bell (b) an electric kettle (c) an electric iron (d) a toaster
4. 4.Which of these mainly gives out heat? (a) a table fan (b) a torch (c) a ceiling fan (d) an electric kettle
5. 5.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
6. 6.Which of these is safe? (a) open a phone charger (b) climb an electric pole (c) use small battery cells (d) fly a kite near wires
7. 7.🔍 Which is the odd one out? (a) climb an electric pole (b) open a phone charger (c) build with an adult near (d) poke things in a socket
8. 8.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
9. 9.💡 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. How many bulbs glow?
10. 10.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
11. 11.Which of these is safe? (a) open a phone charger (b) stay away from pylons (c) throw cells in a fire (d) use a cable with cuts
12. 12.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
13. 13.True or false: if all wires are joined, the circuit is open and no current flows. (a) False (b) True
14. 14.⚡ What does a torch mainly change electricity into? (a) movement (b) sound (c) heat (d) light
15. 15.Which of these is a conductor? (a) a paper strip (b) a woollen thread (c) aluminium foil (d) a plastic straw
16. 16.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
17. 17.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) junction (b) resistor (c) bulb (d) LED
18. 18.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) double the voltage (d) no voltage
19. 19.True or false: a circle with A inside is the symbol for a voltmeter. (a) False (b) True
20. 20.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
21. 21.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) movement energy (d) light energy
22. 22.Which drawing is the symbol for a capacitor? (a) a line lifted at a gap (b) a plain rectangle (c) two or more cell symbols (d) two equal parallel lines
23. 23.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
24. 24.💡 5 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 4 are taken out of their holders. How many bulbs glow?
25. 25.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
26. 26.Which of these means the circuit is open? (a) the switch is OFF (b) the loop is complete (c) all wires are joined (d) the switch is ON
27. 27.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) a break stops every bulb (d) used in house wiring
28. 28.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
30. 30.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) a bigger voltage (d) the same voltage
31. 31.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
32. 32.💡 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. Bulb 1 is taken out of its holder. How many bulbs glow?
33. 33.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) ammeter (b) resistor (c) switch (d) motor
34. 34.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
35. 35.🔘 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?
36. 36.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one for each bulb (d) one
37. 37.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
39. 39.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
40. 40.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same

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