Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 989 · 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 do we call a circuit with a break in it? (a) a full circuit (b) a series circuit (c) a closed circuit (d) an open circuit
2. 2.💡 2 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?
3. 3.Which of these mainly gives out heat? (a) a ceiling fan (b) a mixer grinder (c) an electric iron (d) a night lamp
4. 4.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) to make it colourful (d) symbols are heavier
5. 5.🔍 Which is the odd one out? (a) a torch (b) an electric drill (c) a tube light (d) a night lamp
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
7. 7.🔍 Which is the odd one out? (a) a copper wire (b) aluminium foil (c) a metal paper clip (d) a rubber eraser
8. 8.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a smaller voltage (d) a bigger voltage
9. 9.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
10. 10.True or false: a plastic straw is a conductor. (a) True (b) False
11. 11.True or false: a rubber band is an insulator. (a) True (b) False
12. 12.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
13. 13.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
14. 14.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
15. 15.🔦 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) No (b) Yes
16. 16.True or false: aluminium foil is an insulator. (a) True (b) False
17. 17.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
18. 18.Which of these is safe? (a) touch a fallen wire (b) poke things in a socket (c) climb an electric pole (d) build with an adult near
19. 19.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
21. 21.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
23. 23.Which of these is an insulator? (a) a paper strip (b) a brass key (c) a graphite rod (d) an iron nail
24. 24.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
26. 26.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) a plastic gap (d) one loose end
27. 27.🔍 Which is the odd one out? (a) an LED lamp (b) a room heater (c) a street light (d) a traffic signal
28. 28.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
29. 29.True or false: a tube light mainly gives out light. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) open a phone charger (b) build with an adult near (c) use small battery cells (d) take cells out after use
31. 31.🔋 5 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)? =
32. 32.🔋 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)? =
33. 33.Which of these means the circuit is closed? (a) a wire is cut (b) the switch is OFF (c) a wire has come loose (d) the switch is ON
34. 34.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber band (c) a dry cork (d) a copper wire
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) Yes (b) No
36. 36.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
37. 37.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
39. 39.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) heat (c) movement (d) sound
40. 40.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) motor (b) diode (c) LED (d) battery

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