Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 868 · 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 is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) bulbs share the voltage (d) one out, the rest glow
2. 2.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
3. 3.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) cell (b) ammeter (c) resistor (d) motor
4. 4.🔘 What does a switch do in a circuit? (a) makes electricity (b) changes the voltage (c) stores current (d) opens or closes the loop
5. 5.True or false: a traffic signal mainly gives out light. (a) False (b) True
6. 6.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
7. 7.💡 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. Does bulb 3 glow? (a) No (b) Yes
8. 8.True or false: to build with an adult near is safe. (a) True (b) False
9. 9.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
11. 11.True or false: to open a phone charger is not safe. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) use a cable with cuts (b) throw cells in a fire (c) climb an electric pole (d) build with an adult near
13. 13.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
14. 14.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) a siren (b) a loudspeaker (c) a buzzer (d) an electric iron
16. 16.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
17. 17.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
18. 18.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
19. 19.Which of these gives us electricity? (a) a computer (b) an air conditioner (c) a power station (d) a mobile phone
20. 20.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
21. 21.🔍 Which is the odd one out? (a) a doorbell (b) a buzzer (c) a school bell (d) a mixer grinder
22. 22.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a bulb (d) a plug top
23. 23.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
24. 24.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
25. 25.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
26. 26.🔍 Which is the odd one out? (a) a safety pin (b) an iron nail (c) a ceramic cup (d) a metal paper clip
27. 27.🔍 Which is the odd one out? (a) aluminium foil (b) a plastic straw (c) a copper wire (d) an iron nail
28. 28.⚡ What does a room heater mainly change electricity into? (a) sound (b) light (c) movement (d) heat
29. 29.Which of these mainly gives out light? (a) a toaster (b) an electric toy car (c) a street light (d) a school bell
30. 30.💡 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
31. 31.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a torch (b) an electric kettle (c) a toaster (d) a room heater
33. 33.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
34. 34.Which of these is an insulator? (a) a graphite rod (b) an iron nail (c) a cotton thread (d) a brass key
35. 35.Which of these gives us electricity? (a) a solar panel (b) a television (c) a computer (d) a washing machine
36. 36.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) copper (d) plastic
37. 37.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pour water on them (c) shout for an adult (d) pull them by the hand
38. 38.Which of these is not safe? (a) stay away from pylons (b) take cells out after use (c) use small battery cells (d) use mains for a project
39. 39.🔘 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 OFF and D is ON. Does the bulb glow? (a) Yes (b) No
40. 40.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes

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