Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 796 · 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.🔋 How many 2 V cells must be joined in series to give 8 V?
2. 2.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
3. 3.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
4. 4.Which of these gives us electricity? (a) a television (b) a washing machine (c) a cell (d) a computer
5. 5.True or false: a graphite rod is an insulator. (a) True (b) False
6. 6.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
8. 8.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is OFF, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
9. 9.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) by Wi-Fi (d) not joined
11. 11.True or false: a slide switch closes when tipped over. (a) False (b) True
12. 12.What does a slide switch do? (a) closes when tipped over (b) works only while pressed (c) flips up or down (d) slides side to side
13. 13.True or false: a buzzer mainly makes movement. (a) False (b) True
14. 14.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) many paths for current (d) a single current path
15. 15.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
16. 16.True or false: two or more cell symbols is the symbol for a junction. (a) True (b) False
17. 17.Which of these is true of a series circuit? (a) each gets the full volts (b) bulbs share the voltage (c) own switch for each bulb (d) many paths for current
18. 18.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) one loose end (d) a complete loop
19. 19.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
20. 20.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
21. 21.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a toggle switch (c) a push button (d) a slide switch
22. 22.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
23. 23.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) many paths for current (d) each gets the full volts
24. 24.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) the same voltage (d) no voltage
25. 25.🔌 Most metals are good … (a) insulators (b) batteries (c) conductors (d) magnets only
26. 26.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a torch (b) an electric drill (c) a ceiling fan (d) a mixer grinder
28. 28.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) LED (b) capacitor (c) cell (d) voltmeter
29. 29.Which of these is an insulator? (a) a metal paper clip (b) a copper wire (c) aluminium foil (d) a rubber eraser
30. 30.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
31. 31.🔋 5 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)? =
32. 32.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are ON (c) when both are OFF (d) never
33. 33.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
34. 34.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
35. 35.Which drawing is the symbol for a junction? (a) a circle with M inside (b) a long and a short line (c) a small empty box (d) a dot where wires meet
36. 36.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a fuse or MCB (d) a bulb
37. 37.🔦 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) No (b) Yes
38. 38.🔍 Which is the odd one out? (a) a brass key (b) a metal paper clip (c) a dry cork (d) a steel spoon
39. 39.True or false: a toggle switch closes near a magnet. (a) False (b) True
40. 40.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe

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