Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 974 · 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 not safe? (a) stop if a part gets hot (b) take cells out after use (c) stay away from pylons (d) throw cells in a fire
2. 2.Which of these is an insulator? (a) a wooden stick (b) a metal paper clip (c) a graphite rod (d) a steel spoon
3. 3.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.Which of these gives us electricity? (a) a computer (b) a mobile phone (c) a power station (d) an air conditioner
5. 5.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
6. 6.True or false: a toggle switch flips up or down. (a) True (b) False
7. 7.🔦 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) Yes (b) No
8. 8.Which drawing is the symbol for a bulb? (a) triangle, bar and arrows (b) a circle with a cross (c) a straight line (d) a dot where wires meet
9. 9.Which of these is an insulator? (a) a steel coin (b) a steel spoon (c) a plastic straw (d) a metal paper clip
10. 10.🔍 Which is the odd one out? (a) a ceramic cup (b) a dry cork (c) a safety pin (d) a cotton thread
11. 11.True or false: a steel spoon is a conductor. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) an iron nail (b) a dry cork (c) a rubber band (d) a glass marble
13. 13.True or false: a mixer grinder mainly gives out light. (a) False (b) True
14. 14.⚠️ 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
15. 15.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
16. 16.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is ON and D is OFF. Does the bulb glow? (a) Yes (b) No
17. 17.🔘 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) Yes (b) No
18. 18.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.🔋 6 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
20. 20.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
21. 21.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
22. 22.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
23. 23.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
24. 24.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a cell (d) a switch that is ON
25. 25.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
26. 26.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
28. 28.Which of these is not safe? (a) use small battery cells (b) build with an adult near (c) use mains for a project (d) fly kites in open fields
29. 29.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
30. 30.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) electrons (c) water drops (d) dust particles
31. 31.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) shout for an adult (c) pull them by the hand (d) pour water on them
32. 32.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one for each bulb (d) one
33. 33.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
34. 34.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) a stranger online (d) nobody
35. 35.True or false: a slide switch works only while pressed. (a) True (b) False
36. 36.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
37. 37.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) light energy (c) sound energy (d) chemical energy
38. 38.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
39. 39.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =

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