Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 393 · 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.💡 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) Yes (b) No
2. 2.🔍 Which is the odd one out? (a) a dry cork (b) a ceramic cup (c) a wooden stick (d) a brass key
3. 3.🔍 Which is the odd one out? (a) an electric kettle (b) a traffic signal (c) an electric iron (d) a rice cooker
4. 4.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) bulb (c) wire (d) ammeter
5. 5.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
6. 6.Which drawing is the symbol for a bulb? (a) a small empty box (b) a long and a short line (c) one tall, one short bar (d) a circle with a cross
7. 7.True or false: to use small battery cells is not safe. (a) True (b) False
8. 8.True or false: a line lifted at a gap is the symbol for a voltmeter. (a) False (b) True
9. 9.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
10. 10.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
11. 11.🔍 Which is the odd one out? (a) a rubber eraser (b) an iron nail (c) a brass key (d) a metal paper clip
12. 12.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
13. 13.🔍 Which is the odd one out? (a) an iron nail (b) a rubber band (c) a wooden stick (d) a plastic ruler
14. 14.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) quick and clear for all (d) to hide the circuit
16. 16.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
17. 17.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
18. 18.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
19. 19.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) sound (c) friction (d) a magnet
20. 20.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
22. 22.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) No (b) Yes
23. 23.Which of these is a conductor? (a) a wooden stick (b) a plastic straw (c) a graphite rod (d) a rubber eraser
24. 24.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) many paths for current (d) a break stops every bulb
25. 25.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
26. 26.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
27. 27.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
29. 29.Which of these is safe? (a) use a cable with cuts (b) poke things in a socket (c) use mains for a project (d) use small battery cells
30. 30.🔍 Which is the odd one out? (a) a plastic ruler (b) a steel spoon (c) aluminium foil (d) a graphite rod
31. 31.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) sound (c) heat (d) light
33. 33.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
34. 34.Which of these is not safe? (a) build with an adult near (b) use mains for a project (c) stay away from pylons (d) stop if a part gets hot
35. 35.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
36. 36.True or false: to stop if a part gets hot is not safe. (a) False (b) True
37. 37.True or false: a wooden stick is an insulator. (a) True (b) False
38. 38.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
39. 39.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
40. 40.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =

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