Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 617 · 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, which part is drawn as a circle with A inside? (a) motor (b) ammeter (c) battery (d) resistor
2. 2.💡 6 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. Bulbs 2 and 5 are taken out of their holders. How many bulbs glow?
3. 3.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
4. 4.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) a small empty box (c) a line lifted at a gap (d) a circle with a cross
5. 5.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
6. 6.True or false: to take cells out after use is not safe. (a) False (b) True
7. 7.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
8. 8.🔌 Which metal is used for most electric wires at home? (a) glass (b) copper (c) plastic (d) rubber
9. 9.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) makes electricity (d) stores current
10. 10.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
11. 11.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles
12. 12.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
13. 13.🔋 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)? =
14. 14.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) double the voltage (d) the same voltage
15. 15.💡 4 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?
16. 16.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
17. 17.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
19. 19.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
20. 20.🔍 Which is the odd one out? (a) touch a switch when wet (b) take cells out after use (c) stop if a part gets hot (d) keep drinks far away
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.True or false: an iron nail is a conductor. (a) False (b) True
23. 23.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a woollen thread. Does the bulb glow? (a) No (b) Yes
24. 24.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
25. 25.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
26. 26.True or false: a ceramic cup is a conductor. (a) True (b) False
27. 27.🔘 A bulb and a cell are joined through 4 switches on 4 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?
28. 28.True or false: a wooden stick is a conductor. (a) True (b) False
29. 29.Which of these is an insulator? (a) a rubber eraser (b) aluminium foil (c) an iron nail (d) a brass key
30. 30.🔍 Which is the odd one out? (a) an electric kettle (b) a traffic signal (c) a torch (d) a night lamp
31. 31.💡 2 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. How many bulbs glow?
32. 32.🔍 Which is the odd one out? (a) a graphite rod (b) an iron nail (c) a safety pin (d) a paper strip
33. 33.🔦 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 steel spoon. Does the bulb glow? (a) No (b) Yes
34. 34.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
35. 35.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
36. 36.What does a toggle switch do? (a) stays where you flip it (b) closes near a magnet (c) slides side to side (d) closes when tipped over
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) No (b) Yes
38. 38.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a slide switch (c) a push button (d) a tilt switch
39. 39.🔍 Which is the odd one out? (a) fly a kite near wires (b) dry your hands first (c) fly kites in open fields (d) build with an adult near
40. 40.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True

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