Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 589 · 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: a line lifted at a gap is the symbol for a switch. (a) False (b) True
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
3. 3.Which of these gives us electricity? (a) a mobile phone (b) a television (c) a solar panel (d) a water pump
4. 4.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one out, the rest glow (d) used in house wiring
5. 5.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
6. 6.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
7. 7.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
8. 8.True or false: aluminium foil is a conductor. (a) True (b) False
9. 9.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
10. 10.True or false: to touch a fallen wire is not safe. (a) False (b) True
11. 11.True or false: a brass key is an insulator. (a) False (b) True
12. 12.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) Yes (b) No
13. 13.Which drawing is the symbol for a battery? (a) triangle against a bar (b) a dot where wires meet (c) a circle with an X in it (d) two or more cell symbols
14. 14.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) one out, the rest glow (d) a break stops every bulb
15. 15.Which drawing is the symbol for a battery? (a) a circle with V inside (b) two equal parallel lines (c) many long-short pairs (d) a plain rectangle
16. 16.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) the loop is complete (d) a wire is cut
17. 17.True or false: a steel spoon is an insulator. (a) False (b) True
18. 18.Which of these mainly makes sound? (a) an LED lamp (b) a mixer grinder (c) a torch (d) a siren
19. 19.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
20. 20.True or false: to touch a switch when wet is safe. (a) True (b) False
21. 21.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
22. 22.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.Which drawing is the symbol for a diode? (a) a circle with V inside (b) many long-short pairs (c) triangle against a bar (d) a circle with M inside
24. 24.True or false: a doorbell mainly gives out heat. (a) True (b) False
25. 25.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
26. 26.💡 5 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 5 are taken out of their holders. How many bulbs glow?
27. 27.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
28. 28.Which of these is safe? (a) touch a switch when wet (b) build with an adult near (c) use a cable with cuts (d) touch a fallen wire
29. 29.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
30. 30.True or false: to stop if a part gets hot is safe. (a) False (b) True
31. 31.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
32. 32.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a toggle switch (c) a push button (d) a reed switch
33. 33.Which of these mainly gives out heat? (a) an electric drill (b) an electric toy car (c) a torch (d) an electric iron
34. 34.Which drawing is the symbol for an LED? (a) a straight line (b) triangle, bar and arrows (c) a dot where wires meet (d) a small empty box
35. 35.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
36. 36.💡 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
37. 37.Which of these is an insulator? (a) a steel coin (b) a glass marble (c) a safety pin (d) a metal paper clip
38. 38.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) dotted circles (d) straight lines
39. 39.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the plastic handle (d) the metal tip
40. 40.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. How many bulbs glow?

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