Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 377 · 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: “own switch for each bulb” is true of a series circuit. (a) True (b) False
2. 2.Which of these means the circuit is closed? (a) all wires are joined (b) the switch is OFF (c) a cell is taken out (d) a wire is cut
3. 3.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
4. 4.Which of these is safe? (a) throw cells in a fire (b) touch a fallen wire (c) stay away from pylons (d) poke things in a socket
5. 5.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
6. 6.Which drawing is the symbol for a diode? (a) triangle against a bar (b) a long and a short line (c) a line lifted at a gap (d) a dot where wires meet
7. 7.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
8. 8.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
9. 9.True or false: a circle with V inside is the symbol for a voltmeter. (a) True (b) False
10. 10.True or false: a graphite rod is an insulator. (a) True (b) False
11. 11.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
12. 12.🔍 Which is the odd one out? (a) take cells out after use (b) dry your hands first (c) stay away from pylons (d) touch a switch when wet
13. 13.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
14. 14.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
15. 15.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
16. 16.Which of these gives us electricity? (a) a mobile phone (b) a washing machine (c) a bicycle dynamo (d) a water pump
17. 17.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
18. 18.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 9 V (d) 1.5 V
19. 19.True or false: a rubber eraser is an insulator. (a) False (b) True
20. 20.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
21. 21.Which drawing is the symbol for a junction? (a) two or more cell symbols (b) a circle with M inside (c) a dot where wires meet (d) a circle with A inside
22. 22.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) motor (b) capacitor (c) resistor (d) bulb
23. 23.🔍 Which is the odd one out? (a) throw cells in a fire (b) climb an electric pole (c) open a phone charger (d) stop if a part gets hot
24. 24.⚡ What does a night lamp mainly change electricity into? (a) light (b) heat (c) sound (d) movement
25. 25.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
26. 26.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.⚡ What does a ceiling fan mainly change electricity into? (a) movement (b) light (c) heat (d) sound
29. 29.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) LED (b) motor (c) cell (d) diode
30. 30.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) an insulator (d) a switch that is ON
31. 31.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) one out, the rest glow (d) a single current path
32. 32.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
33. 33.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
34. 34.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
35. 35.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
36. 36.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) a kind of bulb (d) two or more cells joined
38. 38.What does a toggle switch do? (a) works only while pressed (b) stays where you flip it (c) closes near a magnet (d) closes when tipped over
39. 39.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
40. 40.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a plastic gap (d) a complete loop

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