Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 371 · 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 small empty box is the symbol for an ammeter. (a) True (b) False
2. 2.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the filament (d) the glass
3. 3.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
4. 4.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
5. 5.Which drawing is the symbol for a cell? (a) a straight line (b) one tall, one short bar (c) a circle with V inside (d) triangle against a bar
6. 6.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
7. 7.🔘 When a switch is ON, the circuit is … (a) closed (b) broken (c) cut (d) open
8. 8.What does a push button do? (a) flips up or down (b) stays where you flip it (c) springs back when let go (d) closes when tipped over
9. 9.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
10. 10.Which of these mainly makes sound? (a) an electric toy car (b) a night lamp (c) a siren (d) an electric drill
11. 11.Which of these is not safe? (a) stay away from pylons (b) fly a kite near wires (c) take cells out after use (d) dry your hands first
12. 12.Which of these is safe? (a) touch a switch when wet (b) use small battery cells (c) open a phone charger (d) poke things in a socket
13. 13.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
14. 14.💡 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?
15. 15.True or false: triangle against a bar is the symbol for a bulb. (a) True (b) False
16. 16.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
17. 17.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) it is just untidy (c) water carries current (d) water makes it cold
18. 18.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
19. 19.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) ammeter (b) junction (c) battery (d) motor
20. 20.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
21. 21.True or false: an electric drill mainly gives out light. (a) True (b) False
22. 22.What does a tilt switch do? (a) stays where you flip it (b) works only while pressed (c) closes when tipped over (d) springs back when let go
23. 23.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 1.5 V (d) 15 V
24. 24.Which drawing is the symbol for a junction? (a) a straight line (b) two equal parallel lines (c) a dot where wires meet (d) many long-short pairs
25. 25.🔋 6 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)? =
26. 26.🔌 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
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 ON and C is ON. Does the bulb glow? (a) Yes (b) No
28. 28.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
29. 29.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
30. 30.True or false: a plastic ruler is an insulator. (a) True (b) False
31. 31.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
32. 32.Which drawing is the symbol for a capacitor? (a) a circle with V inside (b) a plain rectangle (c) two equal parallel lines (d) a dot where wires meet
33. 33.Which of these mainly makes sound? (a) a school bell (b) an electric drill (c) a ceiling fan (d) a torch
34. 34.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) a magnet (d) electric current
35. 35.🔘 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
36. 36.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) a bigger voltage (c) no voltage (d) the same voltage
37. 37.Which of these is true of a series circuit? (a) one bulb out, all go out (b) many paths for current (c) one out, the rest glow (d) each gets the full volts
38. 38.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) to make them heavy (d) plastic is a conductor
39. 39.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
40. 40.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel

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