Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 631 · 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.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
2. 2.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) copper (d) plastic
3. 3.🔍 Which is the odd one out? (a) a siren (b) a street light (c) a school bell (d) a buzzer
4. 4.🔍 Which is the odd one out? (a) a glass marble (b) a cotton thread (c) a steel spoon (d) a wooden stick
5. 5.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a reed switch (c) a toggle switch (d) a slide switch
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
7. 7.True or false: a circle with V inside is the symbol for a resistor. (a) False (b) True
8. 8.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
9. 9.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) the switch is OFF
10. 10.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
11. 11.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) give them for recycling (d) cut them open
12. 12.True or false: a torch mainly makes sound. (a) False (b) True
13. 13.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
14. 14.True or false: a push button closes when tipped over. (a) True (b) False
15. 15.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
16. 16.🔦 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 spoon. Does the bulb glow? (a) Yes (b) No
17. 17.What does a toggle switch do? (a) closes when tipped over (b) works only while pressed (c) slides side to side (d) stays where you flip it
18. 18.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
19. 19.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
20. 20.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
21. 21.Which of these is a conductor? (a) a woollen thread (b) a cotton thread (c) a brass key (d) a plastic straw
22. 22.💡 3 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?
23. 23.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
24. 24.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
26. 26.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
27. 27.True or false: “a single current path” is true of a series circuit. (a) True (b) False
28. 28.🔘 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
29. 29.What does a toggle switch do? (a) closes near a magnet (b) flips up or down (c) closes when tipped over (d) springs back when let go
30. 30.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) motor (b) wire (c) switch (d) voltmeter
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.🔦 A circuit has a used-up (dead) 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
33. 33.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the filament (c) the base (d) the switch
34. 34.⚡ What does an electric toy car mainly change electricity into? (a) movement (b) heat (c) light (d) sound
35. 35.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) it spoils the paint (c) water makes it cold (d) water carries current
36. 36.Which of these uses electricity? (a) a power station (b) a battery (c) a refrigerator (d) a solar panel
37. 37.Which of these is an insulator? (a) a steel spoon (b) a wooden stick (c) an iron nail (d) aluminium foil
38. 38.🔍 Which is the odd one out? (a) a steel coin (b) a woollen thread (c) a safety pin (d) a copper wire
39. 39.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the loop is complete (c) a wire has come loose (d) a cell is taken out
40. 40.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) switch (b) diode (c) voltmeter (d) battery

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