Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 934 · 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. All the wires are firmly joined. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) No (b) Yes
2. 2.Which of these is safe? (a) touch a switch when wet (b) poke things in a socket (c) fly a kite near wires (d) keep drinks far away
3. 3.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) friction (c) a magnet (d) sound
4. 4.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) dust particles (d) electrons
5. 5.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) a cell is taken out (d) the loop is complete
6. 6.Which of these is a conductor? (a) a rubber eraser (b) a dry cork (c) a ceramic cup (d) a steel coin
7. 7.🔍 Which is the odd one out? (a) throw cells in a fire (b) take cells out after use (c) climb an electric pole (d) use a cable with cuts
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 rubber eraser. Does the bulb glow? (a) Yes (b) No
9. 9.🔘 Which kind of switch slides side to side? (a) a push button (b) a slide switch (c) a reed switch (d) a toggle switch
10. 10.What does a toggle switch do? (a) works only while pressed (b) springs back when let go (c) closes near a magnet (d) stays where you flip it
11. 11.⚡ What does an LED lamp mainly change electricity into? (a) movement (b) heat (c) sound (d) light
12. 12.🔍 Which is the odd one out? (a) a street light (b) a traffic signal (c) a rice cooker (d) an LED lamp
13. 13.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) chemical energy (c) light energy (d) sound energy
14. 14.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
15. 15.⚠️ 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
16. 16.🔍 Which is the odd one out? (a) use mains for a project (b) build with an adult near (c) stop if a part gets hot (d) use small battery cells
17. 17.True or false: a circle with a cross is the symbol for a switch. (a) False (b) True
18. 18.🔋 How many 1.5 V cells must be joined in series to give 3 V?
19. 19.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) a single current path (d) a break stops every bulb
20. 20.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
21. 21.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a long wire (c) a plug top (d) a fuse or MCB
22. 22.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
23. 23.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
24. 24.🔍 Which is the odd one out? (a) climb an electric pole (b) dry your hands first (c) stop if a part gets hot (d) use small battery cells
25. 25.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
26. 26.True or false: to touch a switch when wet is safe. (a) False (b) True
27. 27.True or false: a dot where wires meet is the symbol for a motor. (a) True (b) False
28. 28.Which of these mainly gives out heat? (a) a torch (b) an exhaust fan (c) a mixer grinder (d) an electric iron
29. 29.🔦 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
30. 30.True or false: to use mains for a project is not safe. (a) True (b) False
31. 31.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
32. 32.Which of these is an insulator? (a) a steel coin (b) a copper wire (c) a rubber eraser (d) a steel spoon
33. 33.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
34. 34.True or false: a cotton thread is an insulator. (a) True (b) False
35. 35.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
36. 36.True or false: a reed switch stays where you flip it. (a) True (b) False
37. 37.Which drawing is the symbol for a bulb? (a) two equal parallel lines (b) many long-short pairs (c) a circle with an X in it (d) one tall, one short bar
38. 38.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
39. 39.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) broken (d) cut
40. 40.Which drawing is the symbol for a battery? (a) two or more cell symbols (b) a line lifted at a gap (c) a circle with M inside (d) a small empty box

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