Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 254 · 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: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
2. 2.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) wait and watch (c) pour water on them (d) shout for an adult
3. 3.True or false: an electric kettle mainly gives out heat. (a) False (b) True
4. 4.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a cotton thread (b) a steel coin (c) a graphite rod (d) a safety pin
6. 6.What does a push button do? (a) closes near a magnet (b) stays where you flip it (c) springs back when let go (d) flips up or down
7. 7.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) half the voltage (d) the same voltage
9. 9.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a toggle switch
10. 10.True or false: an electric drill mainly makes sound. (a) True (b) False
11. 11.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a switch that is ON (d) a conductor
12. 12.Which of these is true of a series circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) used in house wiring (d) each gets the full volts
13. 13.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
14. 14.🔍 Which is the odd one out? (a) a loudspeaker (b) a doorbell (c) an exhaust fan (d) a siren
15. 15.💡 2 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. Does bulb 1 glow? (a) Yes (b) No
16. 16.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
17. 17.True or false: a straight line is the symbol for a motor. (a) True (b) False
18. 18.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
19. 19.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) each gets the full volts (d) a break stops every bulb
20. 20.🔘 Which kind of switch works only while pressed? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
21. 21.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
22. 22.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) none (d) two
23. 23.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) dust particles (c) electrons (d) water drops
24. 24.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) a wall socket (d) an inverter socket
25. 25.True or false: to open a phone charger is safe. (a) True (b) False
26. 26.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
27. 27.True or false: to dry your hands first is not safe. (a) True (b) False
28. 28.🔋 7 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)? =
29. 29.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.🔍 Which is the odd one out? (a) a wooden stick (b) a plastic straw (c) a paper strip (d) a brass key
31. 31.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.True or false: a table fan mainly makes sound. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) an LED lamp (b) a tube light (c) a siren (d) a traffic signal
34. 34.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) dotted circles (d) wavy lines
35. 35.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
36. 36.🔋 5 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)? =
37. 37.Which of these is a conductor? (a) a wooden stick (b) a brass key (c) a rubber eraser (d) a paper strip
38. 38.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
39. 39.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor

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