Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 279 · 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.What does a tilt switch do? (a) works only while pressed (b) stays where you flip it (c) closes when tipped over (d) closes near a magnet
2. 2.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
3. 3.🔌 Most metals are good … (a) magnets only (b) conductors (c) insulators (d) batteries
4. 4.💡 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. How many bulbs glow?
5. 5.Which of these is a conductor? (a) a rubber band (b) a graphite rod (c) a paper strip (d) a ceramic cup
6. 6.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a parallel circuit (c) a safe circuit (d) an open circuit
7. 7.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
8. 8.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
9. 9.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
10. 10.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a push button (c) a slide switch (d) a reed switch
11. 11.🔍 Which is the odd one out? (a) take cells out after use (b) touch a fallen wire (c) open a phone charger (d) poke things in a socket
12. 12.Which of these is an insulator? (a) a metal paper clip (b) a steel spoon (c) a plastic straw (d) a copper wire
13. 13.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
14. 14.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
15. 15.🔦 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) No (b) Yes
16. 16.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic makes current (d) plastic is an insulator
17. 17.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
18. 18.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) only one (c) none (d) both of them
19. 19.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
20. 20.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
21. 21.True or false: a tilt switch stays where you flip it. (a) True (b) False
22. 22.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
23. 23.💡 6 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 1 is taken out of its holder. How many bulbs glow?
24. 24.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
25. 25.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) junction (b) capacitor (c) voltmeter (d) cell
26. 26.True or false: a straight line is the symbol for a wire. (a) False (b) True
27. 27.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) light (c) movement (d) heat
28. 28.Which of these is a conductor? (a) a steel spoon (b) a rubber band (c) a paper strip (d) a plastic straw
29. 29.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.Which drawing is the symbol for a junction? (a) a line lifted at a gap (b) triangle against a bar (c) a small empty box (d) a dot where wires meet
32. 32.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
33. 33.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
34. 34.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
35. 35.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) the same voltage (d) double the voltage
36. 36.🔍 Which is the odd one out? (a) stay away from pylons (b) stop if a part gets hot (c) build with an adult near (d) touch a switch when wet
37. 37.Which drawing is the symbol for an LED? (a) a small empty box (b) triangle, bar and arrows (c) a line lifted at a gap (d) two equal parallel lines
38. 38.🔍 Which is the odd one out? (a) stay away from pylons (b) use mains for a project (c) stop if a part gets hot (d) dry your hands first
39. 39.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
40. 40.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =

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