Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 119 · 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.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 1.5 V (d) 0.5 V
2. 2.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
3. 3.Which of these mainly makes sound? (a) a traffic signal (b) a rice cooker (c) a doorbell (d) an electric kettle
4. 4.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
5. 5.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
6. 6.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
7. 7.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.💡 5 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 4 and 5 are taken out of their holders. How many bulbs glow?
9. 9.Which of these is safe? (a) throw cells in a fire (b) take cells out after use (c) open a phone charger (d) touch a switch when wet
10. 10.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
11. 11.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
12. 12.Which of these is safe? (a) use a cable with cuts (b) poke things in a socket (c) build with an adult near (d) climb an electric pole
13. 13.💡 6 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 1 and 4 are taken out of their holders. Does bulb 2 glow? (a) Yes (b) No
14. 14.True or false: a metal paper clip is an insulator. (a) False (b) True
15. 15.🔘 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) No (b) Yes
16. 16.Which drawing is the symbol for a junction? (a) a circle with a cross (b) a dot where wires meet (c) a plain rectangle (d) triangle, bar and arrows
17. 17.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) cut them open (d) give them for recycling
18. 18.Which of these is not safe? (a) dry your hands first (b) touch a switch when wet (c) build with an adult near (d) fly kites in open fields
19. 19.Which of these gives us electricity? (a) a computer (b) an air conditioner (c) a washing machine (d) a battery
20. 20.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) bulb (b) battery (c) resistor (d) switch
21. 21.🔍 Which is the odd one out? (a) a glass marble (b) an iron nail (c) a steel spoon (d) a copper wire
22. 22.True or false: a plastic straw is a conductor. (a) True (b) False
23. 23.Which of these gives us electricity? (a) a water pump (b) a wind turbine (c) a computer (d) a washing machine
24. 24.Which of these is a conductor? (a) a dry cork (b) a rubber band (c) a plastic ruler (d) a brass key
25. 25.Which of these uses electricity? (a) a cell (b) a refrigerator (c) a power station (d) a solar panel
26. 26.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 230 V (c) 12 V (d) 1.5 V
27. 27.⚡ What does a torch mainly change electricity into? (a) sound (b) light (c) movement (d) heat
28. 28.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
29. 29.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) the same voltage (c) no voltage (d) a smaller voltage
30. 30.💡 A battery lights 2 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
31. 31.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
32. 32.Which of these is safe? (a) open a phone charger (b) poke things in a socket (c) fly kites in open fields (d) touch a fallen wire
33. 33.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) a woollen thread (b) a brass key (c) a wooden stick (d) a cotton thread
35. 35.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
36. 36.🔦 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
37. 37.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a toggle switch (c) a push button (d) a slide switch
38. 38.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
39. 39.True or false: many long-short pairs is the symbol for a bulb. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) poke things in a socket (b) fly kites in open fields (c) open a phone charger (d) throw cells in a fire

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