Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 373 · 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 tube light mainly gives out heat. (a) False (b) True
2. 2.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
3. 3.🔘 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) No (b) Yes
4. 4.⚡ What does an electric iron mainly change electricity into? (a) sound (b) light (c) heat (d) movement
5. 5.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) wind energy (c) sound energy (d) light energy
6. 6.Which of these is an insulator? (a) a steel coin (b) aluminium foil (c) a copper wire (d) a plastic ruler
7. 7.Which of these means the circuit is open? (a) the loop is complete (b) a cell is taken out (c) the switch is ON (d) all wires are joined
8. 8.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the switch (c) the glass (d) the base
9. 9.True or false: a push button works only while pressed. (a) False (b) True
10. 10.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
11. 11.🔍 Which is the odd one out? (a) a woollen thread (b) a brass key (c) a cotton thread (d) a glass marble
12. 12.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
13. 13.Which of these mainly makes sound? (a) a water heater (b) an LED lamp (c) an electric toy car (d) a buzzer
14. 14.Which drawing is the symbol for a cell? (a) a small empty box (b) one tall, one short bar (c) a circle with a cross (d) two equal parallel lines
15. 15.🔋 8 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)? =
16. 16.Which of these is an insulator? (a) a steel spoon (b) a brass key (c) a rubber band (d) a steel coin
17. 17.🔍 Which is the odd one out? (a) a steel coin (b) a brass key (c) a rubber eraser (d) a graphite rod
18. 18.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.💡 2 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 2 glow? (a) No (b) Yes
20. 20.⚡ What does an electric drill mainly change electricity into? (a) light (b) heat (c) movement (d) sound
21. 21.🔋 How many 2 V cells must be joined in series to give 14 V?
22. 22.⚡ What does a tube light mainly change electricity into? (a) sound (b) heat (c) movement (d) light
23. 23.🔘 Which kind of switch works only while pressed? (a) a push button (b) a toggle switch (c) a tilt switch (d) a reed switch
24. 24.Which of these mainly gives out light? (a) a rice cooker (b) a buzzer (c) a street light (d) a water heater
25. 25.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
27. 27.🔘 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) Yes (b) No
28. 28.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a push button (c) a toggle switch (d) a slide switch
29. 29.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
30. 30.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
31. 31.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
32. 32.🔍 Which is the odd one out? (a) a copper wire (b) a paper strip (c) a ceramic cup (d) a wooden stick
33. 33.🔦 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 glass marble. Does the bulb glow? (a) No (b) Yes
34. 34.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
35. 35.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
36. 36.🔦 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
37. 37.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
38. 38.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire has come loose
39. 39.💡 2 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
40. 40.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one

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