Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 748 · 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.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) one (d) two
2. 2.Which of these mainly makes sound? (a) a traffic signal (b) a siren (c) a night lamp (d) a water heater
3. 3.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
4. 4.Which of these means the circuit is closed? (a) all wires are joined (b) the switch is OFF (c) a cell is taken out (d) a wire has come loose
5. 5.Which of these is an insulator? (a) an iron nail (b) a safety pin (c) a graphite rod (d) a dry cork
6. 6.🔍 Which is the odd one out? (a) a copper wire (b) a paper strip (c) an iron nail (d) a graphite rod
7. 7.🔦 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
8. 8.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
9. 9.🔋 4 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
10. 10.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
11. 11.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a toggle switch (c) a slide switch (d) a tilt switch
12. 12.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
13. 13.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
14. 14.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
15. 15.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.Which of these uses electricity? (a) a water pump (b) a battery (c) a wind turbine (d) a generator
17. 17.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
18. 18.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
19. 19.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
20. 20.🔍 Which is the odd one out? (a) a ceiling fan (b) a mixer grinder (c) a toaster (d) a table fan
21. 21.🔋 7 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)? =
22. 22.🔍 Which is the odd one out? (a) dry your hands first (b) use small battery cells (c) use a cable with cuts (d) keep drinks far away
23. 23.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
24. 24.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
25. 25.True or false: two or more cell symbols is the symbol for a resistor. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) fly a kite near wires (b) take cells out after use (c) use a cable with cuts (d) poke things in a socket
27. 27.True or false: to take cells out after use is safe. (a) True (b) False
28. 28.What does a reed switch do? (a) springs back when let go (b) slides side to side (c) stays where you flip it (d) closes near a magnet
29. 29.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
31. 31.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) sound energy (d) nuclear energy
32. 32.Which of these is safe? (a) touch a fallen wire (b) fly kites in open fields (c) use mains for a project (d) poke things in a socket
33. 33.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) switch (b) bulb (c) resistor (d) diode
34. 34.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
35. 35.🔍 Which is the odd one out? (a) a street light (b) a torch (c) a ceiling fan (d) an LED lamp
36. 36.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
37. 37.Which of these is safe? (a) build with an adult near (b) use mains for a project (c) poke things in a socket (d) touch a fallen wire
38. 38.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
39. 39.🔍 Which is the odd one out? (a) a steel spoon (b) an iron nail (c) a copper wire (d) a rubber eraser
40. 40.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) bulbs share the voltage (d) many paths for current

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