Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 61 · 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.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
2. 2.🔍 Which is the odd one out? (a) stay away from pylons (b) take cells out after use (c) touch a fallen wire (d) keep drinks far away
3. 3.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
5. 5.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 9 V (d) 1.5 V
6. 6.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) many paths for current (d) bulbs share the voltage
7. 7.True or false: to fly kites in open fields is safe. (a) True (b) False
8. 8.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
9. 9.True or false: to fly kites in open fields is not safe. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) build with an adult near (b) use small battery cells (c) touch a switch when wet (d) dry your hands first
11. 11.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
12. 12.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) a magnet (d) electric current
13. 13.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when both are OFF (d) when either is ON
14. 14.True or false: a glass marble is a conductor. (a) True (b) False
15. 15.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
16. 16.Which of these is safe? (a) use mains for a project (b) poke things in a socket (c) fly kites in open fields (d) open a phone charger
17. 17.🔦 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
18. 18.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
19. 19.🔍 Which is the odd one out? (a) a doorbell (b) a school bell (c) a buzzer (d) a rice cooker
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
21. 21.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
23. 23.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
24. 24.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
25. 25.💡 6 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?
26. 26.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a toggle switch
27. 27.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
28. 28.True or false: a toggle switch slides side to side. (a) True (b) False
29. 29.Which of these is safe? (a) touch a switch when wet (b) climb an electric pole (c) use small battery cells (d) touch a fallen wire
30. 30.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
31. 31.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
32. 32.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
33. 33.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
34. 34.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
35. 35.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
36. 36.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
38. 38.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
39. 39.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes

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