Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 805 · 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.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
2. 2.🔁 What must there be for a current to flow? (a) a complete loop (b) one loose end (c) a plastic gap (d) a broken path
3. 3.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
4. 4.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) diode (b) ammeter (c) cell (d) motor
5. 5.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
6. 6.💡 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
7. 7.🔋 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)? =
8. 8.🔘 Which kind of switch works only while pressed? (a) a push button (b) a reed switch (c) a toggle switch (d) a slide switch
9. 9.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) voltmeter (b) battery (c) capacitor (d) wire
10. 10.True or false: to use mains for a project is not safe. (a) True (b) False
11. 11.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
12. 12.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
13. 13.🔍 Which is the odd one out? (a) a plastic ruler (b) a steel spoon (c) a safety pin (d) an iron nail
14. 14.🔍 Which is the odd one out? (a) aluminium foil (b) a steel spoon (c) a steel coin (d) a ceramic cup
15. 15.What does a push button do? (a) closes when tipped over (b) slides side to side (c) springs back when let go (d) closes near a magnet
16. 16.Which of these is not safe? (a) use small battery cells (b) touch a switch when wet (c) build with an adult near (d) fly kites in open fields
17. 17.True or false: a ceiling fan mainly makes movement. (a) False (b) True
18. 18.Which of these is a conductor? (a) a plastic ruler (b) a plastic straw (c) a glass marble (d) a metal paper clip
19. 19.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
20. 20.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
21. 21.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) an inverter socket (d) a mains extension board
22. 22.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) plastic is an insulator (d) to make them heavy
23. 23.🔋 How many 3 V cells must be joined in series to give 6 V?
24. 24.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
25. 25.🔍 Which is the odd one out? (a) a night lamp (b) a doorbell (c) a traffic signal (d) a street light
26. 26.Which of these is safe? (a) open a phone charger (b) build with an adult near (c) climb an electric pole (d) poke things in a socket
27. 27.True or false: to use small battery cells is safe. (a) True (b) False
28. 28.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
29. 29.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
30. 30.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
32. 32.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) sound (d) electric current
33. 33.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) capacitor (b) resistor (c) wire (d) LED
34. 34.⚡ What does a mixer grinder mainly change electricity into? (a) movement (b) light (c) sound (d) heat
35. 35.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a toggle switch (c) a slide switch (d) a reed switch
36. 36.Which of these mainly makes movement? (a) a room heater (b) an electric drill (c) a siren (d) a buzzer
37. 37.Which of these is safe? (a) open a phone charger (b) touch a switch when wet (c) use a cable with cuts (d) keep drinks far away
38. 38.🔍 Which is the odd one out? (a) a doorbell (b) a siren (c) an LED lamp (d) a buzzer
39. 39.Which of these uses electricity? (a) a bicycle dynamo (b) a computer (c) a battery (d) a cell
40. 40.Which of these uses electricity? (a) a washing machine (b) a solar panel (c) a power station (d) a generator

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