Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 239 · 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.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
2. 2.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
3. 3.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
4. 4.🔘 What does a switch do in a circuit? (a) makes electricity (b) changes the voltage (c) stores current (d) opens or closes the loop
5. 5.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
6. 6.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) the same voltage (c) a smaller voltage (d) no voltage
7. 7.True or false: a woollen thread is an insulator. (a) False (b) True
8. 8.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 0.5 V (c) 230 V (d) 15 V
9. 9.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a slide switch (c) a toggle switch (d) a reed switch
10. 10.🔦 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
11. 11.True or false: a circle with an X in it is the symbol for a voltmeter. (a) True (b) False
12. 12.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
13. 13.💡 4 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?
14. 14.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
15. 15.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) each gets the full volts (c) a single current path (d) one bulb out, all go out
16. 16.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
17. 17.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) closed (d) cut
18. 18.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
19. 19.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
20. 20.🔍 Which is the odd one out? (a) dry your hands first (b) use a cable with cuts (c) take cells out after use (d) stop if a part gets hot
21. 21.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) voltmeter (b) cell (c) resistor (d) diode
22. 22.Which of these is a conductor? (a) a plastic straw (b) a graphite rod (c) a plastic ruler (d) a glass marble
23. 23.True or false: a long and a short line is the symbol for a resistor. (a) False (b) True
24. 24.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
25. 25.True or false: a table fan mainly gives out light. (a) True (b) False
26. 26.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a cell (d) a switch that is ON
27. 27.True or false: to take cells out after use is safe. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) a copper wire (b) aluminium foil (c) a steel coin (d) a ceramic cup
29. 29.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
30. 30.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
31. 31.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
32. 32.Which of these mainly makes movement? (a) a toaster (b) a table fan (c) a rice cooker (d) a night lamp
33. 33.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when either is ON (d) when both are ON
34. 34.What does a toggle switch do? (a) closes near a magnet (b) flips up or down (c) closes when tipped over (d) works only while pressed
35. 35.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
36. 36.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
37. 37.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
38. 38.Which of these mainly gives out light? (a) a ceiling fan (b) a room heater (c) a loudspeaker (d) a street light
39. 39.✏️ In a circuit diagram, which part is drawn as a straight line? (a) bulb (b) wire (c) switch (d) battery
40. 40.True or false: a small empty box is the symbol for a resistor. (a) False (b) True

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