Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 597 · 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: if the loop is complete, the circuit is open and no current flows. (a) False (b) True
2. 2.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) a wire has come loose (d) all wires are joined
3. 3.True or false: a traffic signal mainly gives out light. (a) True (b) False
4. 4.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
5. 5.True or false: a toggle switch stays where you flip it. (a) True (b) False
6. 6.True or false: to open a phone charger is not safe. (a) False (b) True
7. 7.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
8. 8.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
9. 9.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) photons (c) dust particles (d) water drops
10. 10.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) water makes it cold (d) it is just untidy
11. 11.⚡ What does an exhaust fan mainly change electricity into? (a) heat (b) light (c) sound (d) movement
12. 12.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) both lines (d) neither line
13. 13.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
14. 14.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) heat (c) sound (d) movement
15. 15.🔋 8 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)? =
16. 16.Which of these is a conductor? (a) a safety pin (b) a plastic ruler (c) a cotton thread (d) a wooden stick
17. 17.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) voltmeter (b) capacitor (c) junction (d) bulb
18. 18.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
19. 19.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
20. 20.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
21. 21.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) shout for an adult (d) wait and watch
22. 22.🔋 How many 3 V cells must be joined in series to give 18 V?
23. 23.True or false: a plastic straw is a conductor. (a) False (b) True
24. 24.Which of these uses electricity? (a) a wind turbine (b) a generator (c) a cell (d) a refrigerator
25. 25.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
26. 26.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a push button
27. 27.True or false: to touch a switch when wet is not safe. (a) True (b) False
28. 28.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
29. 29.Which of these mainly gives out heat? (a) a loudspeaker (b) a tube light (c) a night lamp (d) an electric kettle
30. 30.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a glass marble. Does the bulb glow? (a) Yes (b) No
31. 31.🔍 Which is the odd one out? (a) fly kites in open fields (b) poke things in a socket (c) use a cable with cuts (d) open a phone charger
32. 32.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a plastic gap (d) a complete loop
33. 33.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
34. 34.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
35. 35.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
36. 36.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) bulbs share the voltage (d) a single current path
37. 37.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
38. 38.True or false: a toggle switch springs back when let go. (a) True (b) False
39. 39.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) resistor (b) junction (c) cell (d) switch
40. 40.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe

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