Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 300 · 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.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
2. 2.Which of these mainly gives out light? (a) an electric iron (b) a water heater (c) an LED lamp (d) a ceiling fan
3. 3.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
4. 4.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) broken (d) closed
5. 5.⚡ What does a table fan mainly change electricity into? (a) light (b) movement (c) heat (d) sound
6. 6.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.Which of these is a conductor? (a) a ceramic cup (b) an iron nail (c) a rubber eraser (d) a wooden stick
8. 8.⚡ What does an electric toy car mainly change electricity into? (a) light (b) sound (c) heat (d) movement
9. 9.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
10. 10.True or false: a loudspeaker mainly gives out light. (a) False (b) True
11. 11.🔋 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)? =
12. 12.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
13. 13.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
14. 14.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
15. 15.True or false: to stay away from pylons is safe. (a) True (b) False
16. 16.Which of these is an insulator? (a) a copper wire (b) an iron nail (c) a metal paper clip (d) a dry cork
17. 17.What does a push button do? (a) closes when tipped over (b) stays where you flip it (c) works only while pressed (d) flips up or down
18. 18.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) switch (b) voltmeter (c) diode (d) motor
20. 20.⚡ What does a school bell mainly change electricity into? (a) heat (b) sound (c) movement (d) light
21. 21.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) an inverter socket (c) a mains extension board (d) a wall socket
23. 23.Which of these is a conductor? (a) a brass key (b) a dry cork (c) a wooden stick (d) a plastic straw
24. 24.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
25. 25.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
26. 26.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.💡 2 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 1 and 2 are taken out of their holders. How many bulbs glow?
29. 29.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a line lifted at a gap (c) many long-short pairs (d) triangle, bar and arrows
30. 30.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
31. 31.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) shout for an adult (c) wait and watch (d) pour water on them
32. 32.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
33. 33.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
34. 34.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
35. 35.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
36. 36.💡 2 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 2 is taken out of its holder. How many bulbs glow?
37. 37.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a safe circuit (c) an open circuit (d) a short circuit
39. 39.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) a break stops every bulb (d) bulbs share the voltage
40. 40.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) electrons (d) water drops

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