Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 4 · 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 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) Yes (b) No
2. 2.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) a bigger voltage (d) no voltage
3. 3.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
4. 4.Which of these mainly gives out light? (a) a school bell (b) a street light (c) a room heater (d) an electric kettle
5. 5.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
6. 6.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
7. 7.Which of these gives us electricity? (a) a computer (b) a power station (c) a washing machine (d) a television
8. 8.What does a push button do? (a) works only while pressed (b) stays where you flip it (c) slides side to side (d) flips up or down
9. 9.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
10. 10.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
11. 11.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) two (d) one for each bulb
12. 12.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) the loop is complete
13. 13.🔘 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) No (b) Yes
14. 14.🔋 6 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.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) LED (b) motor (c) battery (d) ammeter
16. 16.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
17. 17.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a plastic gap (d) a complete loop
18. 18.True or false: to dry your hands first is safe. (a) True (b) False
19. 19.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
20. 20.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
21. 21.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) movement (c) light (d) heat
22. 22.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
23. 23.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) one out, the rest glow (d) one bulb out, all go out
24. 24.🔦 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 a rubber band. Does the bulb glow? (a) No (b) Yes
25. 25.Which of these is a conductor? (a) a paper strip (b) a safety pin (c) a glass marble (d) a wooden stick
26. 26.Which of these mainly makes movement? (a) a street light (b) a torch (c) a rice cooker (d) an electric drill
27. 27.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
28. 28.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
29. 29.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
30. 30.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) it does not matter (d) both of them
31. 31.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a short circuit (d) a safe circuit
32. 32.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) a long and a short line (c) a small empty box (d) triangle against a bar
33. 33.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
35. 35.True or false: to use mains for a project is safe. (a) True (b) False
36. 36.💡 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 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
37. 37.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
38. 38.⚡ What does a room heater mainly change electricity into? (a) sound (b) movement (c) heat (d) light
39. 39.Which of these is an insulator? (a) a metal paper clip (b) a plastic ruler (c) a steel coin (d) an iron nail
40. 40.Which of these mainly gives out heat? (a) a doorbell (b) a room heater (c) a school bell (d) a loudspeaker

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