Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 336 · 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.🔦 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) No (b) Yes
2. 2.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
3. 3.Which of these gives us electricity? (a) a solar panel (b) a washing machine (c) a water pump (d) a refrigerator
4. 4.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
5. 5.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) double the voltage (d) half the voltage
6. 6.Which of these mainly makes sound? (a) a doorbell (b) a night lamp (c) a tube light (d) an electric kettle
7. 7.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) bulb (b) voltmeter (c) cell (d) battery
8. 8.🔦 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 plastic ruler. Does the bulb glow? (a) No (b) Yes
9. 9.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
11. 11.Which of these is true of a series circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) used in house wiring (d) one out, the rest glow
12. 12.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a parallel circuit (c) a short circuit (d) an open circuit
13. 13.🔦 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 woollen thread. Does the bulb glow? (a) No (b) Yes
14. 14.🔍 Which is the odd one out? (a) stop if a part gets hot (b) dry your hands first (c) use a cable with cuts (d) stay away from pylons
15. 15.⚡ What does a mixer grinder mainly change electricity into? (a) movement (b) heat (c) sound (d) light
16. 16.🔍 Which is the odd one out? (a) a glass marble (b) a metal paper clip (c) a wooden stick (d) a paper strip
17. 17.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
18. 18.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
20. 20.Which of these mainly gives out light? (a) a doorbell (b) a traffic signal (c) a siren (d) a toaster
21. 21.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
22. 22.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
23. 23.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) build with an adult near (b) dry your hands first (c) use small battery cells (d) throw cells in a fire
25. 25.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.Which of these is safe? (a) use mains for a project (b) fly kites in open fields (c) touch a switch when wet (d) open a phone charger
27. 27.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
28. 28.True or false: a toaster mainly makes sound. (a) True (b) False
29. 29.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) little stars (d) wavy lines
30. 30.🔍 Which is the odd one out? (a) an exhaust fan (b) a tube light (c) a street light (d) a torch
31. 31.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) it spoils the paint (c) water carries current (d) water makes it cold
32. 32.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
33. 33.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
35. 35.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
36. 36.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
37. 37.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
38. 38.Which of these is safe? (a) poke things in a socket (b) fly a kite near wires (c) use small battery cells (d) open a phone charger
39. 39.True or false: a room heater mainly makes sound. (a) False (b) True
40. 40.🔘 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) Yes (b) No

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