Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 708 · 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.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
2. 2.True or false: many long-short pairs is the symbol for a switch. (a) False (b) True
3. 3.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a single current path (d) used in house wiring
4. 4.🔋 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)? =
5. 5.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
6. 6.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
7. 7.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
8. 8.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) many paths for current (d) a break stops every bulb
9. 9.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) wire (b) motor (c) ammeter (d) diode
10. 10.True or false: to dry your hands first is not safe. (a) False (b) True
11. 11.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
12. 12.True or false: two equal parallel lines is the symbol for a bulb. (a) False (b) True
13. 13.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
14. 14.🔘 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?
15. 15.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
16. 16.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
17. 17.True or false: a dry cork is an insulator. (a) True (b) False
18. 18.True or false: a siren mainly gives out light. (a) True (b) False
19. 19.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) it does not matter (c) none (d) only one
20. 20.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
21. 21.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.🔦 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 plastic straw. Does the bulb glow? (a) Yes (b) No
23. 23.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
24. 24.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
26. 26.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
27. 27.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
29. 29.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
30. 30.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
31. 31.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
32. 32.Which of these is safe? (a) touch a switch when wet (b) open a phone charger (c) take cells out after use (d) use mains for a project
33. 33.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
34. 34.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
35. 35.Which of these mainly gives out heat? (a) a loudspeaker (b) a doorbell (c) a night lamp (d) an electric iron
36. 36.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
37. 37.True or false: two or more cell symbols is the symbol for a bulb. (a) True (b) False
38. 38.💡 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 4 glow? (a) No (b) Yes
39. 39.What does a toggle switch do? (a) closes near a magnet (b) works only while pressed (c) flips up or down (d) springs back when let go
40. 40.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True

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