Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 141 · 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.True or false: a push button springs back when let go. (a) False (b) True
2. 2.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
3. 3.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
4. 4.True or false: a toggle switch stays where you flip it. (a) True (b) False
5. 5.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
6. 6.What does a push button do? (a) slides side to side (b) stays where you flip it (c) closes when tipped over (d) springs back when let go
7. 7.💡 5 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. Does bulb 3 glow? (a) No (b) Yes
8. 8.True or false: to throw cells in a fire is safe. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a brass key (b) a steel coin (c) a rubber eraser (d) aluminium foil
10. 10.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
11. 11.Which of these is true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) one out, the rest glow (d) many paths for current
12. 12.🔁 What must there be for a current to flow? (a) a complete loop (b) one loose end (c) a plastic gap (d) a broken path
13. 13.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) used in house wiring (d) a single current path
14. 14.🔍 Which is the odd one out? (a) an electric kettle (b) a room heater (c) a buzzer (d) a toaster
15. 15.🔌 Most metals are good … (a) batteries (b) insulators (c) conductors (d) magnets only
16. 16.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) water drops (d) photons
17. 17.Which drawing is the symbol for a battery? (a) triangle against a bar (b) two or more cell symbols (c) a circle with M inside (d) a circle with an X in it
18. 18.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
19. 19.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
20. 20.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: a slide switch closes when tipped over. (a) False (b) True
22. 22.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a series circuit (c) a closed circuit (d) a full circuit
23. 23.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
24. 24.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.⚡ What does an LED lamp mainly change electricity into? (a) light (b) sound (c) movement (d) heat
26. 26.Which drawing is the symbol for a wire? (a) triangle, bar and arrows (b) a straight line (c) a circle with a cross (d) two or more cell symbols
27. 27.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) an open circuit (c) a safe circuit (d) a parallel circuit
28. 28.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
29. 29.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) electric current (c) a magnet (d) friction
30. 30.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) wind energy (c) sound energy (d) electrical energy
31. 31.⚡ What does a school bell mainly change electricity into? (a) movement (b) sound (c) heat (d) light
32. 32.Which drawing is the symbol for a diode? (a) one tall, one short bar (b) a dot where wires meet (c) a circle with V inside (d) triangle against a bar
33. 33.🔘 When a switch is ON, the circuit is … (a) closed (b) cut (c) open (d) broken
34. 34.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
35. 35.🔦 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
36. 36.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
37. 37.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
38. 38.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
39. 39.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
40. 40.Which of these gives us electricity? (a) an air conditioner (b) a washing machine (c) a television (d) a wind turbine

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