Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 895 · 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 aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.Which of these means the circuit is open? (a) the switch is ON (b) the bulb is unscrewed (c) all wires are joined (d) the loop is complete
3. 3.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a push button
4. 4.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
5. 5.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
6. 6.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
7. 7.Which of these is not safe? (a) throw cells in a fire (b) dry your hands first (c) fly kites in open fields (d) keep drinks far away
8. 8.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
9. 9.🔦 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
10. 10.🔍 Which is the odd one out? (a) an iron nail (b) a graphite rod (c) a cotton thread (d) a copper wire
11. 11.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) switch (b) capacitor (c) ammeter (d) resistor
12. 12.🔍 Which is the odd one out? (a) use small battery cells (b) stay away from pylons (c) touch a switch when wet (d) build with an adult near
13. 13.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
14. 14.🔍 Which is the odd one out? (a) aluminium foil (b) an iron nail (c) a plastic straw (d) a graphite rod
15. 15.💡 3 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. All the bulbs are in place. Does bulb 2 glow? (a) No (b) Yes
16. 16.Which of these is a conductor? (a) a rubber eraser (b) a wooden stick (c) an iron nail (d) a plastic ruler
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a graphite rod. Does the bulb glow? (a) No (b) Yes
18. 18.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a wire has come loose (d) the switch is ON
19. 19.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) each gets the full volts (d) a single current path
20. 20.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: an electric iron mainly gives out light. (a) True (b) False
22. 22.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
23. 23.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
24. 24.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) voltmeter (b) ammeter (c) diode (d) battery
25. 25.Which of these is not safe? (a) keep drinks far away (b) stay away from pylons (c) fly kites in open fields (d) use mains for a project
26. 26.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
27. 27.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.Which of these is safe? (a) use mains for a project (b) fly kites in open fields (c) throw cells in a fire (d) use a cable with cuts
29. 29.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
30. 30.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
31. 31.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.What does a tilt switch do? (a) closes when tipped over (b) stays where you flip it (c) closes near a magnet (d) slides side to side
33. 33.True or false: a siren mainly gives out heat. (a) True (b) False
34. 34.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
35. 35.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
36. 36.🔍 Which is the odd one out? (a) touch a switch when wet (b) climb an electric pole (c) build with an adult near (d) poke things in a socket
37. 37.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
38. 38.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
39. 39.Which of these is a conductor? (a) a wooden stick (b) a plastic straw (c) a steel coin (d) a rubber band
40. 40.💡 3 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. How many bulbs glow?

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