Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 189 · 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 is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) own switch for each bulb (d) a single current path
2. 2.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
3. 3.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
5. 5.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) wind energy (c) light energy (d) chemical energy
6. 6.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
7. 7.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
8. 8.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the metal tip (d) the plastic handle
9. 9.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) when either is ON (d) never
10. 10.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
11. 11.🔘 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
12. 12.🔘 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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
13. 13.True or false: a woollen thread is an insulator. (a) True (b) False
14. 14.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
15. 15.🔦 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 a steel spoon. Does the bulb glow? (a) Yes (b) No
16. 16.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
17. 17.True or false: a metal paper clip is an insulator. (a) False (b) True
18. 18.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
19. 19.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
20. 20.True or false: two or more cell symbols is the symbol for a resistor. (a) True (b) False
21. 21.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.Which of these is not safe? (a) use mains for a project (b) keep drinks far away (c) build with an adult near (d) stay away from pylons
23. 23.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) it is just untidy (d) water makes it cold
24. 24.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) cut (d) closed
25. 25.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
26. 26.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
27. 27.⚡ What does a street light mainly change electricity into? (a) movement (b) light (c) heat (d) sound
28. 28.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a push button
29. 29.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is OFF (c) a wire is cut (d) the loop is complete
30. 30.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
31. 31.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) nuclear energy (c) sound energy (d) wind energy
32. 32.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
34. 34.True or false: two or more cell symbols is the symbol for a battery. (a) True (b) False
35. 35.Which drawing is the symbol for an ammeter? (a) a plain rectangle (b) a circle with A inside (c) a straight line (d) one tall, one short bar
36. 36.🔍 Which is the odd one out? (a) a steel spoon (b) a wooden stick (c) a dry cork (d) a ceramic cup
37. 37.🔍 Which is the odd one out? (a) an LED lamp (b) a mixer grinder (c) an electric toy car (d) an electric drill
38. 38.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the glass (c) the switch (d) the base
39. 39.True or false: a reed switch stays where you flip it. (a) False (b) True
40. 40.What does a toggle switch do? (a) flips up or down (b) closes near a magnet (c) closes when tipped over (d) springs back when let go

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