Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 573 · 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 circle with V inside is the symbol for a bulb. (a) True (b) False
2. 2.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
3. 3.⚡ What does a night lamp mainly change electricity into? (a) movement (b) light (c) heat (d) sound
4. 4.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
5. 5.🔌 Most metals are good … (a) magnets only (b) insulators (c) batteries (d) conductors
6. 6.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
7. 7.Which of these is true of a series circuit? (a) each gets the full volts (b) bulbs share the voltage (c) own switch for each bulb (d) one out, the rest glow
8. 8.Which of these mainly gives out light? (a) an electric iron (b) an electric kettle (c) a toaster (d) a traffic signal
9. 9.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) a kind of bulb (d) one single wire
10. 10.🔍 Which is the odd one out? (a) an exhaust fan (b) a toaster (c) an electric iron (d) an electric kettle
11. 11.True or false: to stay away from pylons is not safe. (a) True (b) False
12. 12.True or false: an electric drill mainly gives out light. (a) True (b) False
13. 13.🔁 What must there be for a current to flow? (a) a complete loop (b) one loose end (c) a broken path (d) a plastic gap
14. 14.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
15. 15.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
16. 16.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) LED (c) switch (d) bulb
17. 17.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
18. 18.True or false: a long and a short line is the symbol for a motor. (a) False (b) True
19. 19.✏️ 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
20. 20.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a slide switch (c) a toggle switch (d) a tilt switch
21. 21.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) the longer line (d) neither line
22. 22.🔦 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 plastic straw. Does the bulb glow? (a) No (b) Yes
23. 23.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
24. 24.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
25. 25.Which of these uses electricity? (a) an air conditioner (b) a bicycle dynamo (c) a cell (d) a power station
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
27. 27.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) two (d) one
28. 28.True or false: to build with an adult near is safe. (a) True (b) False
29. 29.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) a wire is cut
30. 30.🔍 Which is the odd one out? (a) a steel spoon (b) aluminium foil (c) a metal paper clip (d) a cotton thread
31. 31.🔍 Which is the odd one out? (a) a steel spoon (b) a graphite rod (c) a dry cork (d) a copper wire
32. 32.Which drawing is the symbol for a resistor? (a) triangle against a bar (b) a straight line (c) a plain rectangle (d) a circle with M inside
33. 33.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
34. 34.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the glass (c) the switch (d) the base
36. 36.What does a tilt switch do? (a) closes when tipped over (b) slides side to side (c) springs back when let go (d) stays where you flip it
37. 37.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
38. 38.Which of these gives us electricity? (a) a water pump (b) a battery (c) an air conditioner (d) a computer
39. 39.🔍 Which is the odd one out? (a) a metal paper clip (b) a graphite rod (c) a ceramic cup (d) an iron nail
40. 40.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?

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