Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 519 · 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.Which of these uses electricity? (a) a television (b) a power station (c) a bicycle dynamo (d) a battery
2. 2.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
3. 3.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) capacitor (c) cell (d) voltmeter
4. 4.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
5. 5.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) two or more cells joined (d) a kind of bulb
6. 6.True or false: a brass key is an insulator. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a copper wire (b) a safety pin (c) a metal paper clip (d) a wooden stick
8. 8.Which of these is safe? (a) fly a kite near wires (b) use small battery cells (c) climb an electric pole (d) throw cells in a fire
9. 9.Which of these means the circuit is closed? (a) the switch is OFF (b) the switch is ON (c) the bulb is unscrewed (d) a wire is cut
10. 10.True or false: a reed switch springs back when let go. (a) True (b) False
11. 11.⚡ What does a doorbell mainly change electricity into? (a) heat (b) sound (c) movement (d) light
12. 12.🔌 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
13. 13.True or false: to use a cable with cuts is safe. (a) True (b) False
14. 14.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a wall socket (d) a mains extension board
15. 15.Which of these is safe? (a) touch a switch when wet (b) keep drinks far away (c) poke things in a socket (d) use a cable with cuts
16. 16.True or false: to build with an adult near is not safe. (a) True (b) False
17. 17.🔦 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 copper wire. Does the bulb glow? (a) Yes (b) No
18. 18.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
19. 19.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) sound (c) light (d) movement
20. 20.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
21. 21.True or false: a toaster mainly gives out heat. (a) True (b) False
22. 22.🔦 A circuit has a new cell, a bulb with a broken filament 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
23. 23.💡 5 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. Bulb 3 is taken out of its holder. How many bulbs glow?
24. 24.True or false: a tube light mainly makes movement. (a) False (b) True
25. 25.True or false: a reed switch closes near a magnet. (a) False (b) True
26. 26.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) dotted circles (d) wavy lines
27. 27.Which drawing is the symbol for a cell? (a) two or more cell symbols (b) a line lifted at a gap (c) a small empty box (d) one tall, one short bar
28. 28.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
29. 29.🔁 What must there be for a current to flow? (a) a complete loop (b) one loose end (c) a plastic gap (d) a broken path
30. 30.💡 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?
31. 31.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) electrical energy (c) sound energy (d) wind energy
32. 32.Which of these mainly makes movement? (a) a tube light (b) a night lamp (c) a mixer grinder (d) an LED lamp
33. 33.Which of these means the circuit is closed? (a) the switch is OFF (b) the bulb is unscrewed (c) a wire is cut (d) the loop is complete
34. 34.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.Which of these is a conductor? (a) a copper wire (b) a plastic straw (c) a woollen thread (d) a dry cork
36. 36.True or false: to fly a kite near wires is not safe. (a) False (b) True
37. 37.🔋 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)? =
38. 38.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a tilt switch (c) a reed switch (d) a slide switch
39. 39.True or false: many long-short pairs is the symbol for a switch. (a) False (b) True
40. 40.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True

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