Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 969 · 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.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
2. 2.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
3. 3.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
4. 4.Which of these gives us electricity? (a) a washing machine (b) a computer (c) a battery (d) a television
5. 5.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a reed switch (c) a push button (d) a slide switch
6. 6.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
7. 7.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
8. 8.Which of these is not safe? (a) fly a kite near wires (b) fly kites in open fields (c) stay away from pylons (d) dry your hands first
9. 9.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) none (d) one for each bulb
10. 10.Which of these is not safe? (a) use small battery cells (b) stay away from pylons (c) keep drinks far away (d) use mains for a project
11. 11.🔋 5 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
12. 12.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
14. 14.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
15. 15.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
16. 16.Which of these is an insulator? (a) a rubber band (b) a metal paper clip (c) a steel spoon (d) a safety pin
17. 17.Which of these mainly gives out heat? (a) a night lamp (b) a mixer grinder (c) a toaster (d) a buzzer
18. 18.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
19. 19.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
20. 20.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
21. 21.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
22. 22.🔍 Which is the odd one out? (a) a siren (b) an electric toy car (c) a school bell (d) a doorbell
23. 23.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) use a cable with cuts (b) dry your hands first (c) fly kites in open fields (d) stay away from pylons
25. 25.Which of these uses electricity? (a) a generator (b) a computer (c) a cell (d) a battery
26. 26.🔍 Which is the odd one out? (a) a woollen thread (b) a cotton thread (c) a metal paper clip (d) a paper strip
27. 27.💡 4 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. Does bulb 3 glow? (a) Yes (b) No
28. 28.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
29. 29.Which drawing is the symbol for a resistor? (a) triangle, bar and arrows (b) many long-short pairs (c) a straight line (d) a plain rectangle
30. 30.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) Yes (b) No
31. 31.🔘 Which kind of switch springs back when let go? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a push button
32. 32.Which of these means the circuit is closed? (a) a wire has come loose (b) the loop is complete (c) the switch is OFF (d) the bulb is unscrewed
33. 33.True or false: a push button works only while pressed. (a) False (b) True
34. 34.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
35. 35.Which of these is a conductor? (a) a copper wire (b) a paper strip (c) a plastic straw (d) a dry cork
36. 36.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
38. 38.🔋 What should you do with used-up cells? (a) cut them open (b) throw them in a fire (c) bury them in soil (d) give them for recycling
39. 39.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
40. 40.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) one out, the rest glow (d) one bulb out, all go out

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