Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 769 · 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 of these means the circuit is closed? (a) the switch is OFF (b) the bulb is unscrewed (c) a cell is taken out (d) all wires are joined
2. 2.Which of these is not safe? (a) stop if a part gets hot (b) keep drinks far away (c) use small battery cells (d) throw cells in a fire
3. 3.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
4. 4.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
5. 5.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) one out, the rest glow (d) a single current path
6. 6.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
7. 7.True or false: a buzzer mainly makes sound. (a) True (b) False
8. 8.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 9 V (c) 1.5 V (d) 12 V
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
10. 10.True or false: if the switch is OFF, the circuit is open and no current flows. (a) True (b) False
11. 11.🔦 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
12. 12.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) one loose end (d) a complete loop
13. 13.🔦 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
14. 14.🔍 Which is the odd one out? (a) use small battery cells (b) keep drinks far away (c) take cells out after use (d) touch a switch when wet
15. 15.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
16. 16.Which of these is not safe? (a) touch a switch when wet (b) dry your hands first (c) use small battery cells (d) keep drinks far away
17. 17.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
18. 18.True or false: “a single current path” is true of a series circuit. (a) False (b) True
19. 19.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
20. 20.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
22. 22.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) own switch for each bulb (d) bulbs share the voltage
23. 23.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) light energy (c) sound energy (d) chemical energy
24. 24.🔍 Which is the odd one out? (a) poke things in a socket (b) open a phone charger (c) take cells out after use (d) use mains for a project
25. 25.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.True or false: a plastic straw is an insulator. (a) True (b) False
27. 27.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
28. 28.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
29. 29.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
30. 30.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
31. 31.🔍 Which is the odd one out? (a) a toaster (b) a room heater (c) a street light (d) an electric kettle
32. 32.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) dotted circles (d) little stars
34. 34.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
35. 35.🔍 Which is the odd one out? (a) a mixer grinder (b) an electric drill (c) a ceiling fan (d) a loudspeaker
36. 36.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) a wall socket (c) a mains extension board (d) an inverter socket
37. 37.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) broken (d) closed
38. 38.True or false: a wooden stick is an insulator. (a) True (b) False
39. 39.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
40. 40.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open

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