Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 219 · 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.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
2. 2.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
3. 3.True or false: to use mains for a project is safe. (a) False (b) True
4. 4.🔋 8 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)? =
5. 5.✏️ 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
6. 6.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a bulb (d) a long wire
7. 7.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) one single wire (d) a kind of bulb
8. 8.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
9. 9.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
10. 10.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) glass (d) copper
11. 11.Which of these means the circuit is closed? (a) all wires are joined (b) the bulb is unscrewed (c) the switch is OFF (d) a wire is cut
12. 12.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) switch (b) voltmeter (c) capacitor (d) battery
13. 13.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
14. 14.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: “a single current path” is true of a series circuit. (a) True (b) False
16. 16.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) no voltage (d) double the voltage
17. 17.⚠️ 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 parallel circuit (d) a safe circuit
18. 18.What does a push button do? (a) flips up or down (b) stays where you flip it (c) springs back when let go (d) closes near a magnet
19. 19.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) many paths for current (d) one bulb out, all go out
20. 20.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) never (c) only when both are ON (d) when either is ON
21. 21.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
22. 22.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
23. 23.🔍 Which is the odd one out? (a) stay away from pylons (b) fly kites in open fields (c) fly a kite near wires (d) keep drinks far away
24. 24.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
25. 25.⚡ What does an electric kettle mainly change electricity into? (a) heat (b) movement (c) sound (d) light
26. 26.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a slide switch
27. 27.🔍 Which is the odd one out? (a) a safety pin (b) a steel coin (c) a copper wire (d) a rubber eraser
28. 28.Which of these is an insulator? (a) an iron nail (b) a brass key (c) a rubber eraser (d) a safety pin
29. 29.What does a toggle switch do? (a) closes when tipped over (b) closes near a magnet (c) stays where you flip it (d) works only while pressed
30. 30.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) bulbs share the voltage (d) used in house wiring
31. 31.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
32. 32.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) own switch for each bulb (d) a single current path
33. 33.True or false: a plastic straw is an insulator. (a) True (b) False
34. 34.True or false: aluminium foil is an insulator. (a) True (b) False
35. 35.True or false: to keep drinks far away is safe. (a) False (b) True
36. 36.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a slide switch (c) a toggle switch (d) a push button
37. 37.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) a complete loop (d) one loose end
38. 38.Which drawing is the symbol for an LED? (a) one tall, one short bar (b) many long-short pairs (c) a small empty box (d) triangle, bar and arrows
39. 39.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a toggle switch (c) a reed switch (d) a slide switch
40. 40.🔦 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) Yes (b) No

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