Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 7 · 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.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
2. 2.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) LED (b) junction (c) motor (d) switch
3. 3.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) an inverter socket (c) a small battery pack (d) a wall socket
4. 4.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
5. 5.💡 5 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?
6. 6.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) switch (c) LED (d) bulb
7. 7.Which of these is safe? (a) use a cable with cuts (b) touch a fallen wire (c) build with an adult near (d) use mains for a project
8. 8.True or false: a buzzer mainly gives out light. (a) False (b) True
9. 9.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
10. 10.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
11. 11.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
12. 12.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) ammeter (b) diode (c) junction (d) LED
13. 13.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
14. 14.Which of these is an insulator? (a) a graphite rod (b) a plastic ruler (c) a steel spoon (d) a copper wire
15. 15.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
16. 16.What does a tilt switch do? (a) flips up or down (b) slides side to side (c) closes when tipped over (d) springs back when let go
17. 17.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) it does not matter (d) both of them
18. 18.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) bulbs share the voltage (d) a break stops every bulb
19. 19.🔋 3 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
20. 20.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a metal paper clip. Does the bulb glow? (a) Yes (b) No
21. 21.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
22. 22.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.🔌 Most metals are good … (a) conductors (b) magnets only (c) batteries (d) insulators
24. 24.🔍 Which is the odd one out? (a) build with an adult near (b) dry your hands first (c) touch a switch when wet (d) stop if a part gets hot
25. 25.Which of these gives us electricity? (a) a power station (b) a refrigerator (c) a mobile phone (d) an air conditioner
26. 26.🔦 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) Yes (b) No
27. 27.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
28. 28.Which of these mainly makes sound? (a) a room heater (b) a night lamp (c) a water heater (d) a buzzer
29. 29.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
30. 30.Which of these is true of a series circuit? (a) a single current path (b) used in house wiring (c) many paths for current (d) own switch for each bulb
31. 31.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) a magnet (c) friction (d) electric current
32. 32.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) plastic is an insulator (d) to make them heavy
33. 33.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) junction (b) switch (c) ammeter (d) wire
34. 34.Which of these means the circuit is closed? (a) the switch is OFF (b) the loop is complete (c) a wire is cut (d) a wire has come loose
35. 35.What does a push button do? (a) closes near a magnet (b) flips up or down (c) closes when tipped over (d) works only while pressed
36. 36.💡 A battery lights 2 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
37. 37.✏️ 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
38. 38.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
39. 39.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
40. 40.🔍 Which is the odd one out? (a) a school bell (b) a siren (c) a loudspeaker (d) a water heater

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