Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 668 · 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.Which of these gives us electricity? (a) a computer (b) an air conditioner (c) a generator (d) a television
2. 2.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
3. 3.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
4. 4.True or false: a push button stays where you flip it. (a) True (b) False
5. 5.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) chemical energy (c) sound energy (d) light energy
6. 6.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
7. 7.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) wind energy (c) chemical energy (d) sound energy
8. 8.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) the switch is OFF
9. 9.Which of these is safe? (a) fly a kite near wires (b) poke things in a socket (c) stay away from pylons (d) touch a switch when wet
10. 10.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
11. 11.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.What does a slide switch do? (a) closes when tipped over (b) slides side to side (c) works only while pressed (d) flips up or down
13. 13.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
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 ON and B is OFF. Does the bulb glow? (a) Yes (b) No
15. 15.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) switch (b) capacitor (c) diode (d) motor
16. 16.True or false: a straight line is the symbol for a wire. (a) True (b) False
17. 17.🔋 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)? =
18. 18.Which of these means the circuit is closed? (a) a wire is cut (b) the switch is OFF (c) the switch is ON (d) a cell is taken out
19. 19.Which of these is true of a series circuit? (a) each gets the full volts (b) bulbs share the voltage (c) used in house wiring (d) own switch for each bulb
20. 20.Which of these is an insulator? (a) an iron nail (b) a brass key (c) aluminium foil (d) a plastic straw
21. 21.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
22. 22.True or false: to dry your hands first is safe. (a) False (b) True
23. 23.Which of these mainly makes movement? (a) a water heater (b) a traffic signal (c) an exhaust fan (d) an LED lamp
24. 24.🔍 Which is the odd one out? (a) a school bell (b) a doorbell (c) a loudspeaker (d) a water heater
25. 25.Which of these is not safe? (a) dry your hands first (b) build with an adult near (c) keep drinks far away (d) poke things in a socket
26. 26.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.Which of these uses electricity? (a) a television (b) a generator (c) a battery (d) a power station
28. 28.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
29. 29.Which of these is safe? (a) use mains for a project (b) touch a fallen wire (c) fly kites in open fields (d) open a phone charger
30. 30.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
31. 31.True or false: a torch mainly gives out light. (a) True (b) False
32. 32.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
33. 33.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the plastic handle (c) the metal tip (d) the steel shaft
34. 34.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
35. 35.🔍 Which is the odd one out? (a) fly kites in open fields (b) use a cable with cuts (c) use small battery cells (d) keep drinks far away
36. 36.True or false: an exhaust fan mainly makes movement. (a) True (b) False
37. 37.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) one bulb out, all go out (d) one out, the rest glow
38. 38.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) to hide the circuit (d) quick and clear for all
39. 39.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False

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