Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 866 · 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.True or false: a dot where wires meet is the symbol for a bulb. (a) False (b) True
2. 2.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a plug top (c) a long wire (d) a bulb
3. 3.True or false: to touch a fallen wire is safe. (a) False (b) True
4. 4.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a parallel circuit (c) a short circuit (d) an open circuit
5. 5.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
6. 6.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
7. 7.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
8. 8.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
9. 9.💡 A battery lights 3 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
10. 10.Which of these is safe? (a) use mains for a project (b) dry your hands first (c) climb an electric pole (d) touch a fallen wire
11. 11.True or false: many long-short pairs is the symbol for a motor. (a) True (b) False
12. 12.What does a toggle switch do? (a) stays where you flip it (b) closes when tipped over (c) slides side to side (d) springs back when let go
13. 13.True or false: many long-short pairs is the symbol for a bulb. (a) True (b) False
14. 14.🔌 Most metals are good … (a) magnets only (b) insulators (c) conductors (d) batteries
15. 15.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
16. 16.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
17. 17.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
18. 18.True or false: triangle against a bar is the symbol for a cell. (a) False (b) True
19. 19.True or false: an electric kettle mainly gives out heat. (a) True (b) False
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
21. 21.🔍 Which is the odd one out? (a) a ceramic cup (b) aluminium foil (c) a wooden stick (d) a dry cork
22. 22.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
23. 23.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) a switch that is ON (d) an insulator
24. 24.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
25. 25.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the glass (c) the switch (d) the filament
26. 26.True or false: a woollen thread is a conductor. (a) True (b) False
27. 27.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a slide switch
28. 28.True or false: a small empty box is the symbol for an LED. (a) False (b) True
29. 29.Which of these is not safe? (a) take cells out after use (b) fly kites in open fields (c) use small battery cells (d) touch a fallen wire
30. 30.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
31. 31.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
32. 32.Which of these mainly gives out light? (a) an electric iron (b) a tube light (c) a water heater (d) a buzzer
33. 33.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
34. 34.True or false: to use a cable with cuts is safe. (a) True (b) False
35. 35.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
37. 37.True or false: a circle with V inside is the symbol for a voltmeter. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) use mains for a project (b) stay away from pylons (c) take cells out after use (d) dry your hands first
39. 39.Which of these is an insulator? (a) a steel spoon (b) a cotton thread (c) an iron nail (d) aluminium foil
40. 40.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) neither line (d) the shorter line

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