Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 96 · 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) dotted circles (b) little stars (c) wavy lines (d) straight lines
2. 2.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) quick and clear for all (d) to make it colourful
3. 3.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
4. 4.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
5. 5.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) cut (d) closed
6. 6.🔍 Which is the odd one out? (a) a woollen thread (b) a steel coin (c) a metal paper clip (d) a copper wire
7. 7.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire is cut (c) the bulb is unscrewed (d) the switch is ON
8. 8.Which of these mainly makes sound? (a) a torch (b) a school bell (c) a rice cooker (d) an electric kettle
9. 9.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) the loop is complete (d) the switch is OFF
10. 10.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
11. 11.Which of these means the circuit is open? (a) a cell is taken out (b) all wires are joined (c) the switch is ON (d) the loop is complete
12. 12.Which of these mainly makes movement? (a) an exhaust fan (b) a room heater (c) an electric kettle (d) a tube light
13. 13.Which of these uses electricity? (a) a cell (b) a wind turbine (c) a washing machine (d) a bicycle dynamo
14. 14.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
15. 15.Which of these is a conductor? (a) a rubber band (b) a plastic straw (c) a wooden stick (d) a copper wire
16. 16.True or false: an electric iron mainly gives out light. (a) True (b) False
17. 17.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
18. 18.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
19. 19.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
20. 20.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
21. 21.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when either is ON (d) when both are OFF
22. 22.⚡ What does a school bell mainly change electricity into? (a) movement (b) heat (c) light (d) sound
23. 23.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
24. 24.True or false: a brass key is an insulator. (a) False (b) True
25. 25.Which of these gives us electricity? (a) a television (b) a generator (c) a refrigerator (d) a computer
26. 26.What does a push button do? (a) works only while pressed (b) stays where you flip it (c) slides side to side (d) closes when tipped over
27. 27.🔍 Which is the odd one out? (a) a dry cork (b) a cotton thread (c) a rubber band (d) a safety pin
28. 28.True or false: a doorbell mainly makes sound. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a metal paper clip (b) a safety pin (c) a steel spoon (d) a plastic ruler
30. 30.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) pull them by the hand (d) wait and watch
31. 31.True or false: a straight line is the symbol for a wire. (a) False (b) True
32. 32.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
33. 33.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) sound energy (d) nuclear energy
34. 34.🔍 Which is the odd one out? (a) a torch (b) an electric kettle (c) a room heater (d) an electric iron
35. 35.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
36. 36.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
37. 37.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a push button
39. 39.Which of these is a conductor? (a) a paper strip (b) an iron nail (c) a dry cork (d) a plastic straw
40. 40.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe

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