Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 897 · 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.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) switch (b) resistor (c) bulb (d) LED
2. 2.True or false: if all wires are joined, the circuit is open and no current flows. (a) False (b) True
3. 3.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
4. 4.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
5. 5.🔌 Most metals are good … (a) insulators (b) conductors (c) batteries (d) magnets only
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) both of them (d) only one
7. 7.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
8. 8.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
9. 9.🔋 How many 2 V cells must be joined in series to give 8 V?
10. 10.🔋 Does an air conditioner give electricity or use electricity? (a) gives electricity (b) uses electricity
11. 11.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
12. 12.Which of these mainly makes sound? (a) a doorbell (b) an electric iron (c) a ceiling fan (d) a mixer grinder
13. 13.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
14. 14.Which of these mainly gives out light? (a) an electric toy car (b) a water heater (c) a tube light (d) an exhaust fan
15. 15.Which of these is safe? (a) open a phone charger (b) use small battery cells (c) touch a switch when wet (d) touch a fallen wire
16. 16.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the plastic handle (c) the metal tip (d) the bare end
17. 17.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.True or false: aluminium foil is a conductor. (a) False (b) True
19. 19.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
20. 20.Which drawing is the symbol for an LED? (a) a straight line (b) a plain rectangle (c) triangle, bar and arrows (d) a circle with M inside
21. 21.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
22. 22.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
23. 23.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 1.5 V (d) 230 V
24. 24.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
25. 25.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
26. 26.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
27. 27.💡 5 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
28. 28.Which of these means the circuit is closed? (a) all wires are joined (b) a wire has come loose (c) a cell is taken out (d) the switch is OFF
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) No (b) Yes
30. 30.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) changes the voltage (c) makes electricity (d) stores current
31. 31.🔦 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
32. 32.🔍 Which is the odd one out? (a) a mixer grinder (b) a ceiling fan (c) a rice cooker (d) a table fan
33. 33.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) one bulb out, all go out (d) many paths for current
34. 34.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
35. 35.True or false: a plastic ruler is an insulator. (a) False (b) True
36. 36.⚡ What does a doorbell mainly change electricity into? (a) sound (b) light (c) movement (d) heat
37. 37.Which of these is safe? (a) touch a fallen wire (b) climb an electric pole (c) throw cells in a fire (d) stop if a part gets hot
38. 38.What does a tilt switch do? (a) springs back when let go (b) closes when tipped over (c) flips up or down (d) stays where you flip it
39. 39.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.🔍 Which is the odd one out? (a) stay away from pylons (b) take cells out after use (c) throw cells in a fire (d) use small battery cells

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