Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 365 · 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.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) so all go off together (d) to save copper only
2. 2.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
3. 3.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
4. 4.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
5. 5.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) one bulb out, all go out (d) own switch for each bulb
6. 6.Which of these mainly gives out light? (a) a school bell (b) a mixer grinder (c) a tube light (d) a ceiling fan
7. 7.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
8. 8.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
9. 9.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
10. 10.True or false: to open a phone charger is not safe. (a) True (b) False
11. 11.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a mains extension board (c) a wall socket (d) a small battery pack
12. 12.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
13. 13.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
14. 14.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
15. 15.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) a street light (b) a torch (c) a rice cooker (d) a night lamp
17. 17.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
18. 18.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) a series circuit (d) an open circuit
19. 19.What does a push button do? (a) closes near a magnet (b) slides side to side (c) works only while pressed (d) flips up or down
20. 20.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 3 glow? (a) No (b) Yes
21. 21.🔦 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 brass key. Does the bulb glow? (a) No (b) Yes
22. 22.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) to hide the circuit (d) symbols are heavier
23. 23.Which drawing is the symbol for a motor? (a) many long-short pairs (b) a circle with M inside (c) a dot where wires meet (d) a plain rectangle
24. 24.🔍 Which is the odd one out? (a) use mains for a project (b) open a phone charger (c) fly a kite near wires (d) keep drinks far away
25. 25.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
26. 26.Which of these is not safe? (a) build with an adult near (b) take cells out after use (c) stay away from pylons (d) open a phone charger
27. 27.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
28. 28.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
29. 29.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) LED (b) wire (c) bulb (d) cell
30. 30.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
31. 31.🔦 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) No (b) Yes
32. 32.⚡ What does an exhaust fan mainly change electricity into? (a) heat (b) sound (c) light (d) movement
33. 33.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
34. 34.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) a metal paper clip (b) a graphite rod (c) a woollen thread (d) an iron nail
36. 36.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) give them for recycling (d) bury them in soil
37. 37.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
38. 38.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
39. 39.What does a reed switch do? (a) closes near a magnet (b) slides side to side (c) closes when tipped over (d) stays where you flip it
40. 40.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a safe circuit (d) a short circuit

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