Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 560 · 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: “each gets the full volts” is true of a series circuit. (a) True (b) False
2. 2.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) wind energy
3. 3.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
4. 4.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
5. 5.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) stores current (c) changes the voltage (d) makes electricity
6. 6.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) the same voltage (d) a smaller voltage
7. 7.🔋 4 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)? =
8. 8.True or false: a safety pin is a conductor. (a) True (b) False
9. 9.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a broken path (d) a complete loop
10. 10.Which of these is safe? (a) climb an electric pole (b) stay away from pylons (c) throw cells in a fire (d) fly a kite near wires
11. 11.Which of these is safe? (a) use mains for a project (b) poke things in a socket (c) use a cable with cuts (d) dry your hands first
12. 12.True or false: a straight line is the symbol for a capacitor. (a) True (b) False
13. 13.Which of these mainly makes sound? (a) a water heater (b) a buzzer (c) an electric iron (d) a room heater
14. 14.Which of these means the circuit is open? (a) the switch is ON (b) a wire has come loose (c) the loop is complete (d) all wires are joined
15. 15.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
16. 16.Which drawing is the symbol for an LED? (a) a circle with an X in it (b) triangle, bar and arrows (c) a circle with V inside (d) a plain rectangle
17. 17.🔍 Which is the odd one out? (a) use a cable with cuts (b) climb an electric pole (c) use mains for a project (d) stop if a part gets hot
18. 18.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
19. 19.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic is a conductor (d) plastic makes current
20. 20.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) a cell is taken out (d) the switch is ON
21. 21.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
22. 22.🔍 Which is the odd one out? (a) an LED lamp (b) a water heater (c) a street light (d) a tube light
23. 23.True or false: a safety pin is an insulator. (a) True (b) False
24. 24.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
25. 25.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) nuclear energy (d) sound energy
26. 26.True or false: a paper strip is a conductor. (a) False (b) True
27. 27.🔋 3 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)? =
28. 28.🔍 Which is the odd one out? (a) use mains for a project (b) touch a switch when wet (c) build with an adult near (d) climb an electric pole
29. 29.🔍 Which is the odd one out? (a) a water heater (b) an electric iron (c) a school bell (d) a toaster
30. 30.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
31. 31.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.True or false: a doorbell mainly makes sound. (a) True (b) False
33. 33.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
34. 34.Which of these is not safe? (a) touch a switch when wet (b) fly kites in open fields (c) stop if a part gets hot (d) use small battery cells
35. 35.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
36. 36.Which of these is safe? (a) build with an adult near (b) touch a switch when wet (c) climb an electric pole (d) throw cells in a fire
37. 37.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
38. 38.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
39. 39.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
40. 40.True or false: a brass key is a conductor. (a) False (b) True

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