Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 291 · 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.🔘 What does a switch do in a circuit? (a) makes electricity (b) changes the voltage (c) opens or closes the loop (d) stores current
2. 2.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
3. 3.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
4. 4.True or false: a straight line is the symbol for an LED. (a) False (b) True
5. 5.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) the loop is complete (d) a cell is taken out
6. 6.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
7. 7.Which of these is safe? (a) use mains for a project (b) dry your hands first (c) throw cells in a fire (d) touch a switch when wet
8. 8.Which of these mainly gives out heat? (a) a night lamp (b) a buzzer (c) a rice cooker (d) a traffic signal
9. 9.Which drawing is the symbol for a resistor? (a) a small empty box (b) two equal parallel lines (c) triangle, bar and arrows (d) many long-short pairs
10. 10.Which of these mainly makes sound? (a) an electric drill (b) a room heater (c) a torch (d) a loudspeaker
11. 11.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) ammeter (c) capacitor (d) resistor
12. 12.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) Yes (b) No
13. 13.🔍 Which is the odd one out? (a) use a cable with cuts (b) touch a fallen wire (c) throw cells in a fire (d) build with an adult near
14. 14.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) water drops (d) photons
15. 15.Which drawing is the symbol for a switch? (a) many long-short pairs (b) a long and a short line (c) a dot where wires meet (d) a line lifted at a gap
16. 16.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
18. 18.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
19. 19.🔌 Most metals are good … (a) magnets only (b) insulators (c) batteries (d) conductors
20. 20.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) one (d) two
21. 21.🔋 How many 2 V cells must be joined in series to give 12 V?
22. 22.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
23. 23.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
24. 24.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a plastic ruler. Does the bulb glow? (a) Yes (b) No
25. 25.Which of these uses electricity? (a) a bicycle dynamo (b) a generator (c) a battery (d) a washing machine
26. 26.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
27. 27.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a push button
28. 28.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
29. 29.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire is cut (c) a wire has come loose (d) all wires are joined
30. 30.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) bulbs share the voltage (d) many paths for current
31. 31.Which of these gives us electricity? (a) a washing machine (b) a computer (c) a mobile phone (d) a bicycle dynamo
32. 32.🔋 How many 2 V cells must be joined in series to give 4 V?
33. 33.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
34. 34.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
35. 35.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
36. 36.🔍 Which is the odd one out? (a) a graphite rod (b) a brass key (c) an iron nail (d) a rubber band
37. 37.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
38. 38.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a switch that is ON (d) a cell
39. 39.True or false: to use small battery cells is not safe. (a) False (b) True
40. 40.💡 3 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. Bulb 3 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No

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