Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 603 · 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 means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire has come loose
2. 2.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
3. 3.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) light energy (c) sound energy (d) chemical energy
4. 4.🔍 Which is the odd one out? (a) a doorbell (b) a tube light (c) a torch (d) a traffic signal
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.Which of these means the circuit is closed? (a) all wires are joined (b) the switch is OFF (c) the bulb is unscrewed (d) a wire has come loose
7. 7.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) both of them (d) none
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
9. 9.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.True or false: to poke things in a socket is not safe. (a) True (b) False
11. 11.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
12. 12.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
13. 13.True or false: a safety pin is a conductor. (a) False (b) True
14. 14.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
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. Bulb 2 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
16. 16.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
17. 17.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.True or false: a tilt switch closes near a magnet. (a) False (b) True
19. 19.True or false: a glass marble is an insulator. (a) True (b) False
20. 20.Which drawing is the symbol for a bulb? (a) triangle, bar and arrows (b) a small empty box (c) a circle with a cross (d) a long and a short line
21. 21.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
22. 22.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
23. 23.Which of these is not safe? (a) take cells out after use (b) stop if a part gets hot (c) build with an adult near (d) climb an electric pole
24. 24.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
25. 25.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
26. 26.True or false: a circle with V inside is the symbol for a motor. (a) True (b) False
27. 27.True or false: to dry your hands first is safe. (a) True (b) False
28. 28.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) diode (b) junction (c) cell (d) bulb
29. 29.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) voltmeter (b) wire (c) diode (d) battery
30. 30.Which of these is true of a parallel circuit? (a) a single current path (b) one out, the rest glow (c) bulbs share the voltage (d) one bulb out, all go out
31. 31.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) many paths for current (d) one bulb out, all go out
32. 32.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) each gets the full volts (d) used in house wiring
33. 33.🔘 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
34. 34.Which of these is not safe? (a) keep drinks far away (b) stop if a part gets hot (c) take cells out after use (d) touch a switch when wet
35. 35.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 12 V (c) 1.5 V (d) 230 V
36. 36.True or false: a toggle switch stays where you flip it. (a) True (b) False
37. 37.Which of these gives us electricity? (a) a cell (b) an air conditioner (c) a mobile phone (d) a washing machine
38. 38.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
39. 39.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
40. 40.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the steel shaft (d) the plastic handle

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