Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 456 · 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.🔁 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
2. 2.🔍 Which is the odd one out? (a) poke things in a socket (b) keep drinks far away (c) take cells out after use (d) dry your hands first
3. 3.🔍 Which is the odd one out? (a) a glass marble (b) a wooden stick (c) a woollen thread (d) a metal paper clip
4. 4.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) electrons (d) water drops
5. 5.🔍 Which is the odd one out? (a) a room heater (b) a ceiling fan (c) an electric iron (d) a water heater
6. 6.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
7. 7.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
8. 8.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
9. 9.🔋 How many 3 V cells must be joined in series to give 21 V?
10. 10.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
11. 11.Which drawing is the symbol for a junction? (a) a plain rectangle (b) a dot where wires meet (c) two or more cell symbols (d) many long-short pairs
12. 12.True or false: a reed switch closes near a magnet. (a) True (b) False
13. 13.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
14. 14.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) all wires are joined (d) a cell is taken out
15. 15.🔦 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) No (b) Yes
16. 16.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) by Wi-Fi (d) in parallel
17. 17.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the switch (d) the filament
18. 18.Which drawing is the symbol for a cell? (a) a long and a short line (b) a circle with V inside (c) a circle with A inside (d) a circle with M inside
19. 19.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
20. 20.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
21. 21.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
23. 23.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) a conductor (d) an insulator
24. 24.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) wavy lines (d) straight lines
25. 25.Which of these uses electricity? (a) a generator (b) a solar panel (c) a washing machine (d) a cell
26. 26.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
27. 27.True or false: to dry your hands first is not safe. (a) True (b) False
28. 28.Which of these means the circuit is closed? (a) the switch is ON (b) the switch is OFF (c) a wire is cut (d) a wire has come loose
29. 29.True or false: a push button springs back when let go. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a brass key (b) a rubber band (c) a safety pin (d) aluminium foil
31. 31.🔍 Which is the odd one out? (a) a doorbell (b) a school bell (c) a buzzer (d) a street light
32. 32.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.🔦 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 a wooden stick. Does the bulb glow? (a) No (b) Yes
34. 34.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
35. 35.🔦 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 a glass marble. Does the bulb glow? (a) Yes (b) No
36. 36.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
37. 37.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
38. 38.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
39. 39.Which of these is safe? (a) build with an adult near (b) throw cells in a fire (c) touch a fallen wire (d) use mains for a project
40. 40.🔍 Which is the odd one out? (a) an electric iron (b) a loudspeaker (c) a doorbell (d) a siren

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