Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 737 · 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 circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) Yes (b) No
2. 2.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) motor (b) junction (c) ammeter (d) bulb
3. 3.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
4. 4.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a graphite rod. Does the bulb glow? (a) No (b) Yes
5. 5.Which of these mainly makes movement? (a) a torch (b) an electric toy car (c) a tube light (d) a traffic signal
6. 6.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
7. 7.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
8. 8.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.⚡ What does an LED lamp mainly change electricity into? (a) light (b) movement (c) sound (d) heat
10. 10.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
11. 11.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
12. 12.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
13. 13.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) a safe circuit (d) an open circuit
14. 14.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
15. 15.Which drawing is the symbol for a battery? (a) triangle, bar and arrows (b) a dot where wires meet (c) one tall, one short bar (d) many long-short pairs
16. 16.⚡ What does a buzzer mainly change electricity into? (a) movement (b) sound (c) light (d) heat
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
18. 18.Which drawing is the symbol for an LED? (a) one tall, one short bar (b) triangle, bar and arrows (c) a plain rectangle (d) a dot where wires meet
19. 19.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
20. 20.Which of these uses electricity? (a) a bicycle dynamo (b) a computer (c) a wind turbine (d) a cell
21. 21.Which of these mainly gives out light? (a) a toaster (b) a room heater (c) a street light (d) an electric iron
22. 22.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
23. 23.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) friction (d) electric current
24. 24.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: a metal paper clip is an insulator. (a) False (b) True
26. 26.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) junction (c) ammeter (d) LED
27. 27.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.What does a push button do? (a) closes near a magnet (b) stays where you flip it (c) flips up or down (d) springs back when let go
29. 29.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
30. 30.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
31. 31.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
32. 32.What does a push button do? (a) slides side to side (b) works only while pressed (c) closes when tipped over (d) stays where you flip it
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) straight lines (d) little stars
34. 34.Which of these mainly gives out heat? (a) an electric kettle (b) a street light (c) a mixer grinder (d) a table fan
35. 35.Which of these means the circuit is closed? (a) a wire is cut (b) a cell is taken out (c) the switch is OFF (d) all wires are joined
36. 36.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
37. 37.🔋 What should you do with used-up cells? (a) cut them open (b) bury them in soil (c) give them for recycling (d) throw them in a fire
38. 38.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
39. 39.🔍 Which is the odd one out? (a) a mixer grinder (b) an exhaust fan (c) a table fan (d) an LED lamp
40. 40.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) No (b) Yes

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