Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 744 · 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.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
3. 3.True or false: a torch mainly makes movement. (a) False (b) True
4. 4.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) resistor (b) voltmeter (c) battery (d) capacitor
5. 5.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) capacitor (b) junction (c) battery (d) cell
6. 6.🔘 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 OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
7. 7.🔋 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)? =
8. 8.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
9. 9.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
10. 10.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
11. 11.Which of these uses electricity? (a) a computer (b) a solar panel (c) a battery (d) a power station
12. 12.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
13. 13.True or false: a circle with M inside is the symbol for an LED. (a) False (b) True
14. 14.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
15. 15.True or false: a plastic ruler is an insulator. (a) True (b) False
16. 16.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
17. 17.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
18. 18.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
19. 19.Which drawing is the symbol for a resistor? (a) two or more cell symbols (b) a small empty box (c) triangle, bar and arrows (d) a circle with M inside
20. 20.Which of these is safe? (a) keep drinks far away (b) climb an electric pole (c) poke things in a socket (d) fly a kite near wires
21. 21.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) battery (b) wire (c) bulb (d) cell
22. 22.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
23. 23.Which of these gives us electricity? (a) a computer (b) a television (c) a battery (d) a refrigerator
24. 24.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) many paths for current (d) a break stops every bulb
25. 25.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
27. 27.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) Yes (b) No
28. 28.Which of these is not safe? (a) use small battery cells (b) stop if a part gets hot (c) take cells out after use (d) poke things in a socket
29. 29.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) dotted circles (d) wavy lines
30. 30.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
31. 31.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) broken (d) cut
32. 32.What does a tilt switch do? (a) closes when tipped over (b) slides side to side (c) stays where you flip it (d) flips up or down
33. 33.💡 6 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 5 and 6 are taken out of their holders. How many bulbs glow?
34. 34.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.What does a slide switch do? (a) stays where you flip it (b) works only while pressed (c) flips up or down (d) slides side to side
36. 36.Which of these is not safe? (a) fly kites in open fields (b) stop if a part gets hot (c) use small battery cells (d) touch a fallen wire
37. 37.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the plastic handle (c) the steel shaft (d) the metal tip
38. 38.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
39. 39.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
40. 40.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it spoils the paint (c) it is just untidy (d) water makes it cold

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