Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 764 · 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 means the circuit is closed? (a) a cell is taken out (b) the loop is complete (c) a wire has come loose (d) a wire is cut
2. 2.🔌 Most metals are good … (a) insulators (b) magnets only (c) conductors (d) batteries
3. 3.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
4. 4.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
5. 5.True or false: to climb an electric pole is safe. (a) False (b) True
6. 6.🔦 A circuit has a used-up (dead) 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) Yes (b) No
7. 7.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
8. 8.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) a single current path (d) each gets the full volts
9. 9.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
10. 10.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are OFF (c) never (d) only when both are ON
11. 11.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) each gets the full volts (d) many paths for current
12. 12.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
13. 13.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) nuclear energy (c) sound energy (d) electrical energy
14. 14.True or false: a safety pin is a conductor. (a) False (b) True
15. 15.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
16. 16.True or false: to open a phone charger is not safe. (a) False (b) True
17. 17.True or false: to keep drinks far away is not safe. (a) True (b) False
18. 18.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) straight lines (d) dotted circles
19. 19.Which of these gives us electricity? (a) a washing machine (b) a battery (c) a computer (d) a mobile phone
20. 20.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
21. 21.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
22. 22.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) each gets the full volts (d) one bulb out, all go out
23. 23.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
24. 24.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) closed (d) broken
25. 25.True or false: to touch a switch when wet is not safe. (a) True (b) False
26. 26.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
27. 27.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
29. 29.Which of these uses electricity? (a) a power station (b) a cell (c) a battery (d) a television
30. 30.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
31. 31.Which of these gives us electricity? (a) a washing machine (b) a refrigerator (c) a bicycle dynamo (d) an air conditioner
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a safety pin. Does the bulb glow? (a) No (b) Yes
33. 33.Which of these is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) used in house wiring (d) many paths for current
34. 34.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
35. 35.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
36. 36.🔘 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) No (b) Yes
37. 37.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) wire (c) battery (d) capacitor
38. 38.Which of these gives us electricity? (a) an air conditioner (b) a television (c) a computer (d) a solar panel
39. 39.What does a tilt switch do? (a) works only while pressed (b) springs back when let go (c) closes near a magnet (d) closes when tipped over
40. 40.Which drawing is the symbol for a cell? (a) many long-short pairs (b) a circle with a cross (c) triangle against a bar (d) one tall, one short bar

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