Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 63 · 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 is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) one out, the rest glow (d) many paths for current
2. 2.True or false: a push button flips up or down. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) stop if a part gets hot (b) use mains for a project (c) open a phone charger (d) poke things in a socket
4. 4.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a woollen thread. Does the bulb glow? (a) No (b) Yes
5. 5.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
6. 6.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) movement energy (c) chemical energy (d) light energy
7. 7.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
8. 8.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
9. 9.🔋 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)? =
10. 10.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
11. 11.True or false: a steel coin is a conductor. (a) False (b) True
12. 12.Which of these is not safe? (a) poke things in a socket (b) fly kites in open fields (c) build with an adult near (d) take cells out after use
13. 13.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the loop is complete (c) a wire is cut (d) a wire has come loose
14. 14.💡 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
15. 15.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
16. 16.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a tilt switch (c) a slide switch (d) a push button
17. 17.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
18. 18.True or false: an electric kettle mainly gives out light. (a) True (b) False
19. 19.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
20. 20.What does a push button do? (a) works only while pressed (b) closes near a magnet (c) slides side to side (d) stays where you flip it
21. 21.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) both of them (c) only one (d) none
22. 22.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) capacitor (b) ammeter (c) diode (d) bulb
23. 23.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
24. 24.Which of these is safe? (a) fly a kite near wires (b) use mains for a project (c) fly kites in open fields (d) use a cable with cuts
25. 25.True or false: a buzzer mainly makes sound. (a) True (b) False
26. 26.True or false: to use small battery cells is safe. (a) False (b) True
27. 27.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
28. 28.🔍 Which is the odd one out? (a) a water heater (b) a table fan (c) an electric kettle (d) an electric iron
29. 29.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when either is ON (c) never (d) when both are ON
30. 30.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) movement (c) light (d) heat
31. 31.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
32. 32.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
33. 33.True or false: a plastic ruler is an insulator. (a) False (b) True
34. 34.Which of these is a conductor? (a) a wooden stick (b) a dry cork (c) a glass marble (d) a graphite rod
35. 35.Which of these is an insulator? (a) a steel coin (b) a graphite rod (c) an iron nail (d) a ceramic cup
36. 36.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
37. 37.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
38. 38.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
39. 39.Which of these uses electricity? (a) a cell (b) a wind turbine (c) a power station (d) a computer
40. 40.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same

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