Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 614 · 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 paper strip is an insulator. (a) False (b) True
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
3. 3.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) one bulb out, all go out (d) a break stops every bulb
4. 4.Which drawing is the symbol for a wire? (a) a straight line (b) triangle against a bar (c) triangle, bar and arrows (d) many long-short pairs
5. 5.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
6. 6.💡 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
7. 7.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) capacitor (b) cell (c) ammeter (d) motor
8. 8.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) touch a switch when wet (d) dry your hands first
9. 9.Which of these gives us electricity? (a) a television (b) a mobile phone (c) a generator (d) a water pump
10. 10.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
11. 11.🔦 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) No (b) Yes
12. 12.💡 A battery lights 5 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
13. 13.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
14. 14.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a push button (c) a reed switch (d) a toggle switch
15. 15.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire is cut (c) all wires are joined (d) the bulb is unscrewed
16. 16.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
17. 17.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) each gets the full volts (d) a single current path
18. 18.Which of these is safe? (a) throw cells in a fire (b) use a cable with cuts (c) touch a fallen wire (d) build with an adult near
19. 19.Which of these is true of a series circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) many paths for current (d) used in house wiring
20. 20.Which of these is safe? (a) stay away from pylons (b) fly a kite near wires (c) poke things in a socket (d) use a cable with cuts
21. 21.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
22. 22.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) battery (b) ammeter (c) capacitor (d) resistor
23. 23.What does a tilt switch do? (a) stays where you flip it (b) slides side to side (c) flips up or down (d) closes when tipped over
24. 24.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
25. 25.🔍 Which is the odd one out? (a) a metal paper clip (b) a graphite rod (c) an iron nail (d) a dry cork
26. 26.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
27. 27.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
28. 28.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 9 V (d) 1.5 V
29. 29.Which of these mainly gives out heat? (a) a traffic signal (b) an electric toy car (c) a street light (d) a water heater
30. 30.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
31. 31.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) ammeter (b) battery (c) LED (d) wire
33. 33.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
34. 34.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
35. 35.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) neither line (d) the longer line
36. 36.💡 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
37. 37.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) each gets the full volts (d) own switch for each bulb
38. 38.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
39. 39.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
40. 40.🔦 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

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