Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 362 · 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 an insulator? (a) a metal paper clip (b) a steel coin (c) a plastic ruler (d) a copper wire
2. 2.🔍 Which is the odd one out? (a) a copper wire (b) a brass key (c) a steel coin (d) a plastic straw
3. 3.True or false: an electric drill mainly gives out heat. (a) True (b) False
4. 4.💡 A battery lights 5 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
5. 5.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) a traffic signal (b) an electric iron (c) a tube light (d) a torch
7. 7.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
8. 8.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
9. 9.🔦 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) Yes (b) No
10. 10.Which of these is a conductor? (a) a plastic straw (b) a rubber eraser (c) a dry cork (d) a copper wire
11. 11.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
12. 12.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
13. 13.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
14. 14.True or false: to fly kites in open fields is not safe. (a) True (b) False
15. 15.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
16. 16.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is OFF (c) a wire is cut (d) all wires are joined
17. 17.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
18. 18.💡 4 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?
19. 19.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
20. 20.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) one (d) two
21. 21.True or false: to dry your hands first is safe. (a) False (b) True
22. 22.🔦 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 plastic ruler. Does the bulb glow? (a) Yes (b) No
23. 23.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
24. 24.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
25. 25.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
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.⚡ What does a doorbell mainly change electricity into? (a) sound (b) movement (c) light (d) heat
28. 28.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
29. 29.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a short circuit (c) a parallel circuit (d) a safe circuit
30. 30.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
31. 31.True or false: to dry your hands first is not safe. (a) True (b) False
32. 32.💡 2 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. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
33. 33.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
34. 34.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
35. 35.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
36. 36.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
37. 37.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) wind energy (c) light energy (d) chemical energy
38. 38.Which of these mainly makes movement? (a) an electric iron (b) a siren (c) an electric drill (d) a night lamp
39. 39.🔍 Which is the odd one out? (a) use mains for a project (b) use a cable with cuts (c) use small battery cells (d) poke things in a socket
40. 40.True or false: a tilt switch stays where you flip it. (a) True (b) False

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