Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 68 · 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 is the odd one out? (a) open a phone charger (b) dry your hands first (c) build with an adult near (d) use small battery cells
2. 2.Which of these is an insulator? (a) a cotton thread (b) a graphite rod (c) a steel coin (d) a brass key
3. 3.True or false: a steel coin is an insulator. (a) False (b) True
4. 4.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) chemical energy (c) sound energy (d) light energy
5. 5.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) sound energy (c) light energy (d) chemical energy
6. 6.🔍 Which is the odd one out? (a) an exhaust fan (b) a water heater (c) a rice cooker (d) an electric kettle
7. 7.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) ammeter (b) bulb (c) battery (d) capacitor
8. 8.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
9. 9.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
10. 10.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
11. 11.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) a bigger voltage (d) no voltage
12. 12.Which of these is an insulator? (a) a copper wire (b) a glass marble (c) a metal paper clip (d) aluminium foil
13. 13.🔋 How many 2 V cells must be joined in series to give 14 V?
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
15. 15.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
16. 16.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 9 V (d) 230 V
17. 17.True or false: to touch a switch when wet is safe. (a) False (b) True
18. 18.💡 A battery lights 2 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
19. 19.True or false: to throw cells in a fire is not safe. (a) True (b) False
20. 20.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
21. 21.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) none (d) two
22. 22.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
23. 23.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
24. 24.Which of these means the circuit is closed? (a) a wire has come loose (b) a cell is taken out (c) the bulb is unscrewed (d) the switch is ON
25. 25.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) capacitor (c) cell (d) voltmeter
26. 26.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
27. 27.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
28. 28.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a circle with a cross (c) two or more cell symbols (d) a circle with an X in it
29. 29.True or false: a plain rectangle is the symbol for a resistor. (a) False (b) True
30. 30.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
31. 31.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) one out, the rest glow (d) bulbs share the voltage
32. 32.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) an inverter socket (d) a small battery pack
33. 33.Which of these is true of a series circuit? (a) a single current path (b) each gets the full volts (c) one out, the rest glow (d) many paths for current
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.What does a tilt switch do? (a) closes when tipped over (b) stays where you flip it (c) works only while pressed (d) slides side to side
36. 36.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
37. 37.🔘 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
38. 38.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) bulb (b) LED (c) resistor (d) battery
39. 39.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) photons (c) dust particles (d) water drops
40. 40.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity

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