Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 356 · 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 a conductor? (a) a graphite rod (b) a wooden stick (c) a paper strip (d) a rubber eraser
2. 2.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
3. 3.What does a toggle switch do? (a) closes when tipped over (b) stays where you flip it (c) springs back when let go (d) works only while pressed
4. 4.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
5. 5.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) electrical energy (c) nuclear energy (d) wind energy
6. 6.True or false: one tall, one short bar is the symbol for a bulb. (a) True (b) False
7. 7.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
9. 9.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) sound energy (c) light energy (d) movement energy
10. 10.Which drawing is the symbol for a bulb? (a) a plain rectangle (b) triangle against a bar (c) a circle with an X in it (d) one tall, one short bar
11. 11.🔌 Most metals are good … (a) magnets only (b) insulators (c) conductors (d) batteries
12. 12.🔍 Which is the odd one out? (a) aluminium foil (b) a graphite rod (c) a brass key (d) a rubber eraser
13. 13.🔦 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 brass key. Does the bulb glow? (a) No (b) Yes
14. 14.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
16. 16.Which of these means the circuit is open? (a) the switch is OFF (b) all wires are joined (c) the loop is complete (d) the switch is ON
17. 17.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
18. 18.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) one out, the rest glow (d) a break stops every bulb
19. 19.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
20. 20.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
21. 21.Which of these gives us electricity? (a) a battery (b) a mobile phone (c) a washing machine (d) an air conditioner
22. 22.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a slide switch
23. 23.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
24. 24.💡 5 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. Bulbs 2 and 4 are taken out of their holders. How many bulbs glow?
25. 25.True or false: an iron nail is an insulator. (a) False (b) True
26. 26.Which of these is safe? (a) poke things in a socket (b) throw cells in a fire (c) build with an adult near (d) fly a kite near wires
27. 27.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
28. 28.True or false: to fly kites in open fields is safe. (a) True (b) False
29. 29.True or false: aluminium foil is a conductor. (a) False (b) True
30. 30.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
31. 31.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
32. 32.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
33. 33.Which of these uses electricity? (a) a wind turbine (b) a solar panel (c) a power station (d) a mobile phone
34. 34.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.🔍 Which is the odd one out? (a) an LED lamp (b) a street light (c) a torch (d) an electric iron
37. 37.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 230 V (d) 1.5 V
38. 38.🔍 Which is the odd one out? (a) build with an adult near (b) climb an electric pole (c) use small battery cells (d) fly kites in open fields
39. 39.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
40. 40.What does a reed switch do? (a) closes near a magnet (b) closes when tipped over (c) springs back when let go (d) stays where you flip it

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