Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 89 · 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.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
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
3. 3.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
4. 4.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) electric current (d) sound
5. 5.True or false: a ceramic cup is a conductor. (a) True (b) False
6. 6.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) capacitor (c) voltmeter (d) ammeter
7. 7.🔍 Which is the odd one out? (a) a loudspeaker (b) a street light (c) a torch (d) a night lamp
8. 8.Which drawing is the symbol for a resistor? (a) a long and a short line (b) a plain rectangle (c) one tall, one short bar (d) many long-short pairs
9. 9.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) a single current path (d) many paths for current
10. 10.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
11. 11.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
12. 12.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
13. 13.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
14. 14.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
16. 16.What does a toggle switch do? (a) closes when tipped over (b) stays where you flip it (c) springs back when let go (d) works only while pressed
17. 17.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) closed (d) cut
18. 18.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) the shorter line (c) both lines (d) neither line
19. 19.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
20. 20.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
21. 21.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
23. 23.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
24. 24.Which of these is an insulator? (a) a metal paper clip (b) a rubber band (c) aluminium foil (d) a steel coin
25. 25.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
26. 26.🔍 Which is the odd one out? (a) a water heater (b) a rice cooker (c) an electric kettle (d) a school bell
27. 27.True or false: a push button springs back when let go. (a) False (b) True
28. 28.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
29. 29.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
30. 30.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
31. 31.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.Which drawing is the symbol for a cell? (a) a long and a short line (b) a circle with V inside (c) a small empty box (d) many long-short pairs
33. 33.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
34. 34.Which of these means the circuit is closed? (a) a wire is cut (b) the switch is ON (c) a wire has come loose (d) the switch is OFF
35. 35.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
36. 36.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) one bulb out, all go out (d) one out, the rest glow
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
38. 38.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
39. 39.🔦 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) Yes (b) No
40. 40.🔋 4 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =

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