Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 475 · 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.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
2. 2.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
3. 3.🔍 Which is the odd one out? (a) an LED lamp (b) a street light (c) a torch (d) an electric kettle
4. 4.⚡ What does a buzzer mainly change electricity into? (a) movement (b) heat (c) sound (d) light
5. 5.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
6. 6.What does a push button do? (a) closes near a magnet (b) stays where you flip it (c) slides side to side (d) springs back when let go
7. 7.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
8. 8.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
9. 9.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
11. 11.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) closed (d) cut
12. 12.🔘 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
13. 13.🔍 Which is the odd one out? (a) build with an adult near (b) use small battery cells (c) poke things in a socket (d) keep drinks far away
14. 14.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
15. 15.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
16. 16.True or false: to keep drinks far away is not safe. (a) False (b) True
17. 17.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.Which drawing is the symbol for a battery? (a) a long and a short line (b) many long-short pairs (c) a straight line (d) a small empty box
19. 19.🔌 Which metal is used for most electric wires at home? (a) copper (b) glass (c) plastic (d) rubber
20. 20.True or false: triangle against a bar is the symbol for a resistor. (a) True (b) False
21. 21.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are OFF (c) never (d) when both are ON
22. 22.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
23. 23.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
24. 24.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
25. 25.Which of these mainly gives out heat? (a) a room heater (b) a table fan (c) an electric toy car (d) a school bell
26. 26.🔍 Which is the odd one out? (a) a graphite rod (b) a steel coin (c) a paper strip (d) a metal paper clip
27. 27.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
28. 28.🔋 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)? =
29. 29.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
30. 30.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
31. 31.💡 A battery lights 4 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
32. 32.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
33. 33.🔍 Which is the odd one out? (a) a dry cork (b) an iron nail (c) a paper strip (d) a wooden stick
34. 34.What does a tilt switch do? (a) flips up or down (b) works only while pressed (c) closes when tipped over (d) slides side to side
35. 35.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
36. 36.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
37. 37.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
38. 38.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
39. 39.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
40. 40.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) bulbs share the voltage (d) many paths for current

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