Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 885 · 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.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) a magnet (c) friction (d) electric current
2. 2.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a cell (d) a conductor
3. 3.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
4. 4.Which of these uses electricity? (a) a power station (b) a computer (c) a bicycle dynamo (d) a wind turbine
5. 5.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) it does not matter (d) both of them
6. 6.⚡ What does a school bell mainly change electricity into? (a) movement (b) heat (c) light (d) sound
7. 7.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
8. 8.True or false: an electric drill mainly gives out heat. (a) True (b) False
9. 9.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) each gets the full volts (d) a break stops every bulb
10. 10.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
11. 11.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
12. 12.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
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 rubber eraser. Does the bulb glow? (a) No (b) Yes
14. 14.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) wire (b) switch (c) battery (d) ammeter
15. 15.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
16. 16.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
18. 18.🔘 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 OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
19. 19.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
20. 20.Which of these is an insulator? (a) a cotton thread (b) a graphite rod (c) a steel spoon (d) a metal paper clip
21. 21.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
22. 22.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) cut (d) broken
23. 23.True or false: a ceramic cup is a conductor. (a) True (b) False
24. 24.Which of these gives us electricity? (a) a wind turbine (b) a washing machine (c) a water pump (d) a computer
25. 25.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
26. 26.🔍 Which is the odd one out? (a) build with an adult near (b) use a cable with cuts (c) poke things in a socket (d) fly a kite near wires
27. 27.🔋 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)? =
28. 28.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) wire (c) bulb (d) diode
29. 29.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
30. 30.True or false: a woollen thread is an insulator. (a) False (b) True
31. 31.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
32. 32.🔋 4 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)? =
33. 33.🔍 Which is the odd one out? (a) dry your hands first (b) keep drinks far away (c) fly kites in open fields (d) climb an electric pole
34. 34.🔘 Which kind of switch works only while pressed? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a push button
35. 35.Which of these mainly makes sound? (a) an electric drill (b) a rice cooker (c) a school bell (d) a toaster
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
37. 37.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
38. 38.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
39. 39.True or false: to touch a fallen wire is not safe. (a) True (b) False
40. 40.Which drawing is the symbol for a bulb? (a) a straight line (b) a circle with an X in it (c) a circle with A inside (d) triangle, bar and arrows

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