Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 344 · 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 part of a screwdriver should an electrician hold? (a) the steel shaft (b) the bare end (c) the plastic handle (d) the metal tip
2. 2.True or false: a dry cork is an insulator. (a) True (b) False
3. 3.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
4. 4.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a mains extension board (c) a wall socket (d) a small battery pack
5. 5.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
6. 6.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
7. 7.💡 2 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 2 is taken out of its holder. How many bulbs glow?
8. 8.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) light energy (d) sound energy
9. 9.Which of these gives us electricity? (a) a water pump (b) a cell (c) a computer (d) a refrigerator
10. 10.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
11. 11.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
13. 13.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) a wire has come loose
14. 14.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when either is ON (c) when both are ON (d) when both are OFF
15. 15.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) quick and clear for all (d) symbols are heavier
16. 16.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
17. 17.🔍 Which is the odd one out? (a) an electric toy car (b) a buzzer (c) a doorbell (d) a school bell
18. 18.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a bulb (c) a plug top (d) a long wire
19. 19.💡 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
20. 20.🔍 Which is the odd one out? (a) a brass key (b) a copper wire (c) a rubber eraser (d) a steel coin
21. 21.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
22. 22.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
23. 23.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
24. 24.⚡ What does a siren mainly change electricity into? (a) sound (b) movement (c) light (d) heat
25. 25.True or false: a dry cork is a conductor. (a) True (b) False
26. 26.Which of these is true of a series circuit? (a) one out, the rest glow (b) a single current path (c) own switch for each bulb (d) many paths for current
27. 27.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
28. 28.Which drawing is the symbol for a bulb? (a) a circle with a cross (b) a long and a short line (c) a straight line (d) a circle with V inside
29. 29.Which of these gives us electricity? (a) a mobile phone (b) a washing machine (c) a television (d) a generator
30. 30.Which of these mainly gives out light? (a) a rice cooker (b) a doorbell (c) a torch (d) a mixer grinder
31. 31.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
32. 32.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
33. 33.True or false: a wooden stick is an insulator. (a) False (b) True
34. 34.🔦 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
35. 35.Which of these is not safe? (a) open a phone charger (b) stay away from pylons (c) keep drinks far away (d) take cells out after use
36. 36.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
37. 37.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a cell is taken out (c) a wire is cut (d) all wires are joined
38. 38.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
39. 39.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
40. 40.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a tilt switch (c) a slide switch (d) a reed switch

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