Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 346 · 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 paper strip is a conductor. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a steel spoon (b) aluminium foil (c) a ceramic cup (d) a steel coin
3. 3.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) dust particles (c) water drops (d) electrons
4. 4.True or false: a small empty box is the symbol for a motor. (a) False (b) True
5. 5.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
6. 6.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) one bulb out, all go out (d) many paths for current
7. 7.🔍 Which is the odd one out? (a) use small battery cells (b) fly a kite near wires (c) throw cells in a fire (d) poke things in a socket
8. 8.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) motor (c) switch (d) capacitor
9. 9.🔦 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
10. 10.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 230 V (c) 1.5 V (d) 9 V
12. 12.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) touch a fallen wire (b) stay away from pylons (c) take cells out after use (d) fly kites in open fields
14. 14.Which of these mainly makes movement? (a) a room heater (b) a school bell (c) a ceiling fan (d) an electric iron
15. 15.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
16. 16.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
17. 17.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
18. 18.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
19. 19.Which of these is a conductor? (a) a woollen thread (b) a plastic straw (c) a glass marble (d) aluminium foil
20. 20.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
21. 21.True or false: a graphite rod is a conductor. (a) False (b) True
22. 22.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
23. 23.Which of these mainly makes movement? (a) a night lamp (b) a water heater (c) an exhaust fan (d) a tube light
24. 24.True or false: a loudspeaker mainly gives out light. (a) False (b) True
25. 25.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) cell (c) diode (d) bulb
26. 26.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) bulb (b) wire (c) resistor (d) voltmeter
27. 27.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
28. 28.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
29. 29.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
30. 30.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) heat (c) light (d) sound
31. 31.🔍 Which is the odd one out? (a) touch a switch when wet (b) poke things in a socket (c) dry your hands first (d) throw cells in a fire
32. 32.⚡ What does a siren mainly change electricity into? (a) heat (b) light (c) sound (d) movement
33. 33.Which drawing is the symbol for a cell? (a) a long and a short line (b) a circle with V inside (c) a circle with an X in it (d) two or more cell symbols
34. 34.Which of these is safe? (a) use a cable with cuts (b) touch a switch when wet (c) take cells out after use (d) climb an electric pole
35. 35.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) bulb (b) resistor (c) switch (d) cell
36. 36.Which drawing is the symbol for a switch? (a) a circle with M inside (b) a straight line (c) a line lifted at a gap (d) a long and a short line
37. 37.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
38. 38.Which drawing is the symbol for a diode? (a) a circle with V inside (b) a plain rectangle (c) many long-short pairs (d) triangle against a bar
39. 39.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) little stars (d) wavy lines
40. 40.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)

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