Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 844 · 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 mainly makes sound? (a) a night lamp (b) an electric kettle (c) a siren (d) a traffic signal
2. 2.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.True or false: a long and a short line is the symbol for a motor. (a) True (b) False
4. 4.🔦 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 glass marble. Does the bulb glow? (a) No (b) Yes
5. 5.True or false: a steel coin is an insulator. (a) True (b) False
6. 6.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) movement energy (d) sound energy
7. 7.What does a toggle switch do? (a) works only while pressed (b) flips up or down (c) closes when tipped over (d) springs back when let go
8. 8.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) own switch for each bulb (d) a break stops every bulb
9. 9.🔍 Which is the odd one out? (a) a ceramic cup (b) a steel spoon (c) a glass marble (d) a wooden stick
10. 10.True or false: a circle with A inside is the symbol for a cell. (a) False (b) True
11. 11.What does a tilt switch do? (a) closes when tipped over (b) stays where you flip it (c) slides side to side (d) springs back when let go
12. 12.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
13. 13.🔋 How many 3 V cells must be joined in series to give 6 V?
14. 14.🔍 Which is the odd one out? (a) a street light (b) a torch (c) a tube light (d) a rice cooker
15. 15.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the loop is complete (c) a wire is cut (d) a wire has come loose
16. 16.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
17. 17.What does a push button do? (a) closes when tipped over (b) flips up or down (c) springs back when let go (d) stays where you flip it
18. 18.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
19. 19.🔦 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) No (b) Yes
20. 20.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
21. 21.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) many long-short pairs (c) a small empty box (d) a circle with a cross
22. 22.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
23. 23.True or false: an electric toy car mainly gives out heat. (a) True (b) False
24. 24.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) one loose end (d) a plastic gap
25. 25.Which of these gives us electricity? (a) a computer (b) a mobile phone (c) a bicycle dynamo (d) a water pump
26. 26.True or false: a dry cork is an insulator. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) a steel spoon (b) aluminium foil (c) a graphite rod (d) a paper strip
28. 28.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a plastic straw (b) a glass marble (c) a safety pin (d) a paper strip
31. 31.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 230 V (c) 1.5 V (d) 9 V
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) Yes (b) No
33. 33.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
34. 34.🔘 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
35. 35.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
36. 36.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
37. 37.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.🔍 Which is the odd one out? (a) fly a kite near wires (b) build with an adult near (c) open a phone charger (d) climb an electric pole
39. 39.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) a small battery pack (d) an inverter socket
40. 40.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False

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