Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 582 · 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 kind of switch works only while pressed? (a) a reed switch (b) a push button (c) a toggle switch (d) a tilt switch
2. 2.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a cell (d) a conductor
3. 3.True or false: to fly kites in open fields is safe. (a) False (b) True
4. 4.Which of these is an insulator? (a) aluminium foil (b) a graphite rod (c) a copper wire (d) a glass marble
5. 5.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
6. 6.🔋 How many 3 V cells must be joined in series to give 6 V?
7. 7.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
8. 8.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) wire (c) LED (d) ammeter
9. 9.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the filament (c) the base (d) the glass
10. 10.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
11. 11.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
12. 12.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
13. 13.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) wind energy (c) chemical energy (d) light energy
14. 14.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
16. 16.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
17. 17.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
18. 18.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) motor (b) resistor (c) battery (d) wire
19. 19.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
20. 20.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
21. 21.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
22. 22.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
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 steel coin. Does the bulb glow? (a) No (b) Yes
24. 24.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
25. 25.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
26. 26.Which of these mainly gives out heat? (a) a school bell (b) a siren (c) a table fan (d) an electric iron
27. 27.Which of these mainly makes sound? (a) an exhaust fan (b) a water heater (c) a loudspeaker (d) a torch
28. 28.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
29. 29.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
30. 30.True or false: a ceiling fan mainly gives out light. (a) False (b) True
31. 31.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) LED (c) capacitor (d) cell
32. 32.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
33. 33.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
34. 34.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
35. 35.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) sound energy (c) light energy (d) chemical energy
36. 36.🔍 Which is the odd one out? (a) keep drinks far away (b) fly kites in open fields (c) use a cable with cuts (d) stay away from pylons
37. 37.Which of these is a conductor? (a) a glass marble (b) a rubber eraser (c) a wooden stick (d) a steel spoon
38. 38.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) light (c) movement (d) sound
39. 39.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) an open circuit (d) a safe circuit
40. 40.True or false: to fly a kite near wires is not safe. (a) True (b) False

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