Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 159 · 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.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) the shorter line (d) both lines
2. 2.Which drawing is the symbol for a wire? (a) a straight line (b) a circle with M inside (c) a small empty box (d) a line lifted at a gap
3. 3.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
4. 4.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
5. 5.True or false: a room heater mainly gives out light. (a) False (b) True
6. 6.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) dotted circles (d) wavy lines
7. 7.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
8. 8.Which of these mainly makes sound? (a) an electric iron (b) a buzzer (c) a street light (d) an LED lamp
9. 9.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
10. 10.Which of these is a conductor? (a) a steel spoon (b) a plastic straw (c) a ceramic cup (d) a rubber band
11. 11.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) a wire is cut
12. 12.True or false: a plastic straw is a conductor. (a) False (b) True
13. 13.True or false: triangle, bar and arrows is the symbol for a junction. (a) True (b) False
14. 14.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) sound energy (c) movement energy (d) light energy
15. 15.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
16. 16.True or false: to use small battery cells is safe. (a) False (b) True
17. 17.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) an inverter socket (d) a wall socket
18. 18.🔘 What does a switch do in a circuit? (a) changes the voltage (b) stores current (c) opens or closes the loop (d) makes electricity
19. 19.🔋 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)? =
20. 20.Which drawing is the symbol for a voltmeter? (a) a line lifted at a gap (b) many long-short pairs (c) a long and a short line (d) a circle with V inside
21. 21.Which of these is safe? (a) take cells out after use (b) poke things in a socket (c) touch a switch when wet (d) climb an electric pole
22. 22.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
23. 23.Which of these uses electricity? (a) a computer (b) a solar panel (c) a generator (d) a bicycle dynamo
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
25. 25.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
26. 26.What does a toggle switch do? (a) works only while pressed (b) stays where you flip it (c) slides side to side (d) springs back when let go
27. 27.⚡ What does an LED lamp mainly change electricity into? (a) sound (b) heat (c) light (d) movement
28. 28.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) so all go off together (d) to save copper only
29. 29.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) resistor (b) diode (c) voltmeter (d) switch
31. 31.True or false: to dry your hands first is safe. (a) True (b) False
32. 32.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
34. 34.🔋 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)? =
35. 35.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
36. 36.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
37. 37.True or false: to fly kites in open fields is not safe. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) a ceramic cup (b) a plastic straw (c) a brass key (d) a woollen thread
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.🔘 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 ON and C is OFF. Does the bulb glow? (a) No (b) Yes

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