Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 489 · 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 drawing is the symbol for a junction? (a) a dot where wires meet (b) a circle with M inside (c) one tall, one short bar (d) a circle with a cross
2. 2.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
3. 3.Which of these is not safe? (a) stop if a part gets hot (b) dry your hands first (c) touch a switch when wet (d) stay away from pylons
4. 4.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
5. 5.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) only one (d) both of them
7. 7.Which drawing is the symbol for an ammeter? (a) a long and a short line (b) a line lifted at a gap (c) a circle with A inside (d) a circle with an X in it
8. 8.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
9. 9.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) straight lines (d) little stars
10. 10.Which of these mainly gives out heat? (a) a siren (b) an LED lamp (c) an electric kettle (d) a street light
11. 11.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
12. 12.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) Yes (b) No
13. 13.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when either is ON (d) when both are OFF
14. 14.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
15. 15.Which of these uses electricity? (a) a solar panel (b) a generator (c) a cell (d) a mobile phone
16. 16.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb
17. 17.True or false: a table fan mainly gives out light. (a) False (b) True
18. 18.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
19. 19.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a push button (c) a reed switch (d) a slide switch
20. 20.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) the same voltage (c) no voltage (d) a smaller voltage
21. 21.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
22. 22.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
23. 23.Which of these is not safe? (a) dry your hands first (b) keep drinks far away (c) climb an electric pole (d) use small battery cells
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
25. 25.True or false: triangle, bar and arrows is the symbol for a battery. (a) True (b) False
26. 26.Which drawing is the symbol for a motor? (a) a circle with M inside (b) triangle, bar and arrows (c) a long and a short line (d) many long-short pairs
27. 27.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
28. 28.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
29. 29.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
30. 30.🔦 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
31. 31.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a plug top (c) a long wire (d) a bulb
32. 32.💡 6 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 3 are taken out of their holders. Does bulb 2 glow? (a) No (b) Yes
33. 33.Which of these mainly gives out heat? (a) a school bell (b) an exhaust fan (c) a water heater (d) an electric drill
34. 34.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.Which of these mainly gives out light? (a) a night lamp (b) an exhaust fan (c) an electric iron (d) a ceiling fan
36. 36.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
37. 37.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) cut them open (d) throw them in a fire
38. 38.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
39. 39.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
40. 40.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch

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