Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 561 · 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.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) dotted circles (d) wavy lines
2. 2.Which drawing is the symbol for an LED? (a) a circle with an X in it (b) triangle, bar and arrows (c) a line lifted at a gap (d) a plain rectangle
3. 3.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) one for each bulb (d) none
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
5. 5.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) a copper wire (b) a rubber band (c) a safety pin (d) a metal paper clip
7. 7.What does a toggle switch do? (a) works only while pressed (b) springs back when let go (c) flips up or down (d) closes near a magnet
8. 8.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
9. 9.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
10. 10.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) an insulator (d) a cell
11. 11.Which of these is not safe? (a) stop if a part gets hot (b) dry your hands first (c) use small battery cells (d) open a phone charger
12. 12.Which drawing is the symbol for a diode? (a) a dot where wires meet (b) triangle against a bar (c) a long and a short line (d) a line lifted at a gap
13. 13.💡 A battery lights 2 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
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
15. 15.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.Which of these gives us electricity? (a) a power station (b) a refrigerator (c) an air conditioner (d) a mobile phone
17. 17.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) both of them (d) only one
18. 18.🔋 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)? =
19. 19.Which drawing is the symbol for a voltmeter? (a) two or more cell symbols (b) a circle with V inside (c) triangle against a bar (d) many long-short pairs
20. 20.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) voltmeter (c) bulb (d) diode
21. 21.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
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.🔋 3 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)? =
24. 24.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) water carries current (c) it is just untidy (d) it spoils the paint
25. 25.True or false: triangle, bar and arrows is the symbol for an LED. (a) True (b) False
26. 26.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) used in house wiring (d) a single current path
27. 27.Which of these is true of a series circuit? (a) used in house wiring (b) bulbs share the voltage (c) each gets the full volts (d) many paths for current
28. 28.💡 3 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 1 is taken out of its holder. How many bulbs glow?
29. 29.🔍 Which is the odd one out? (a) a mixer grinder (b) a toaster (c) an electric toy car (d) an exhaust fan
30. 30.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
31. 31.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
34. 34.Which of these is an insulator? (a) aluminium foil (b) a brass key (c) a plastic ruler (d) a steel spoon
35. 35.🔍 Which is the odd one out? (a) take cells out after use (b) climb an electric pole (c) build with an adult near (d) stop if a part gets hot
36. 36.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
37. 37.Which of these mainly gives out heat? (a) an exhaust fan (b) a doorbell (c) a room heater (d) a night lamp
38. 38.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) used in house wiring (d) one out, the rest glow
39. 39.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 3 glow? (a) No (b) Yes
40. 40.What does a push button do? (a) flips up or down (b) closes when tipped over (c) springs back when let go (d) slides side to side

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