Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 927 · 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 push button springs back when let go. (a) True (b) False
2. 2.💡 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
3. 3.True or false: a tube light mainly gives out heat. (a) False (b) True
4. 4.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
5. 5.🔋 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)? =
6. 6.True or false: a dot where wires meet is the symbol for a junction. (a) False (b) True
7. 7.Which of these is a conductor? (a) a rubber band (b) aluminium foil (c) a cotton thread (d) a plastic ruler
8. 8.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
9. 9.True or false: to touch a fallen wire is not safe. (a) False (b) True
10. 10.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
11. 11.True or false: a steel spoon is an insulator. (a) True (b) False
12. 12.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
13. 13.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) only one (d) both of them
14. 14.🔍 Which is the odd one out? (a) fly kites in open fields (b) poke things in a socket (c) stop if a part gets hot (d) build with an adult near
15. 15.🔋 6 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)? =
16. 16.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) sound energy (c) light energy (d) movement energy
17. 17.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) sound (c) electric current (d) a magnet
18. 18.🔋 6 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)? =
19. 19.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
20. 20.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a bigger voltage (d) a smaller voltage
21. 21.What does a slide switch do? (a) flips up or down (b) closes when tipped over (c) slides side to side (d) springs back when let go
22. 22.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
23. 23.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
24. 24.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
26. 26.True or false: a loudspeaker mainly makes sound. (a) True (b) False
27. 27.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a plug top (d) a bulb
28. 28.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
29. 29.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
30. 30.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
31. 31.Which of these means the circuit is closed? (a) a wire has come loose (b) the loop is complete (c) the bulb is unscrewed (d) a wire is cut
32. 32.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) motor (b) cell (c) bulb (d) battery
33. 33.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) voltmeter (b) ammeter (c) bulb (d) resistor
34. 34.Which drawing is the symbol for a resistor? (a) a long and a short line (b) a circle with M inside (c) a plain rectangle (d) one tall, one short bar
35. 35.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) the bulb is unscrewed (d) all wires are joined
36. 36.True or false: a paper strip is a conductor. (a) False (b) True
37. 37.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a trusted adult (d) a stranger online
38. 38.Which drawing is the symbol for a junction? (a) two or more cell symbols (b) a straight line (c) a dot where wires meet (d) a small empty box
39. 39.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) resistor (b) wire (c) capacitor (d) voltmeter
40. 40.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) it is just untidy (d) water makes it cold

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