Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 860 · 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.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
3. 3.Which of these is not safe? (a) throw cells in a fire (b) keep drinks far away (c) use small battery cells (d) fly kites in open fields
4. 4.True or false: to fly a kite near wires is safe. (a) True (b) False
5. 5.True or false: a wooden stick is an insulator. (a) True (b) False
6. 6.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
7. 7.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
8. 8.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.Which of these gives us electricity? (a) a generator (b) an air conditioner (c) a television (d) a mobile phone
10. 10.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) double the voltage (d) no voltage
11. 11.Which of these gives us electricity? (a) a wind turbine (b) an air conditioner (c) a mobile phone (d) a refrigerator
12. 12.True or false: to use mains for a project is not safe. (a) True (b) False
13. 13.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a graphite rod. Does the bulb glow? (a) Yes (b) No
14. 14.🔦 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
15. 15.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
16. 16.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
17. 17.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) when either is ON (c) never (d) only when both are OFF
18. 18.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
19. 19.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a push button (c) a slide switch (d) a tilt switch
20. 20.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 4 glow? (a) No (b) Yes
21. 21.Which of these means the circuit is closed? (a) the loop is complete (b) a wire has come loose (c) a wire is cut (d) a cell is taken out
22. 22.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
23. 23.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
24. 24.🔍 Which is the odd one out? (a) a plastic ruler (b) a glass marble (c) a wooden stick (d) a graphite rod
25. 25.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) photons (d) electrons
26. 26.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 0.5 V (d) 1.5 V
27. 27.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
28. 28.True or false: a ceramic cup is an insulator. (a) False (b) True
29. 29.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) two or more cells joined (d) a switch with a lid
30. 30.True or false: a dot where wires meet is the symbol for a junction. (a) True (b) False
31. 31.Which of these is not safe? (a) stop if a part gets hot (b) use mains for a project (c) build with an adult near (d) take cells out after use
32. 32.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
33. 33.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
34. 34.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
35. 35.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
36. 36.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a slide switch (c) a toggle switch (d) a reed switch
37. 37.Which of these is a conductor? (a) a plastic straw (b) a paper strip (c) a metal paper clip (d) a plastic ruler
38. 38.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
39. 39.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
40. 40.🔍 Which is the odd one out? (a) use small battery cells (b) keep drinks far away (c) take cells out after use (d) poke things in a socket

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