Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 17 · 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.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
2. 2.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) bulbs share the voltage (d) a break stops every bulb
3. 3.🔘 Which kind of switch springs back when let go? (a) a slide switch (b) a reed switch (c) a push button (d) a tilt switch
4. 4.True or false: to take cells out after use is not safe. (a) True (b) False
5. 5.Which of these gives us electricity? (a) a computer (b) a generator (c) a mobile phone (d) a water pump
6. 6.⚡ What does a room heater mainly change electricity into? (a) sound (b) movement (c) heat (d) light
7. 7.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
8. 8.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.🔘 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) Yes (b) No
10. 10.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
11. 11.⚡ What does a street light mainly change electricity into? (a) heat (b) sound (c) movement (d) light
12. 12.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) sound (d) friction
13. 13.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) by Wi-Fi (d) not joined
14. 14.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
15. 15.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
16. 16.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
17. 17.True or false: to stay away from pylons is safe. (a) True (b) False
18. 18.Which of these uses electricity? (a) a power station (b) a generator (c) a solar panel (d) a washing machine
19. 19.🔍 Which is the odd one out? (a) use a cable with cuts (b) climb an electric pole (c) throw cells in a fire (d) build with an adult near
20. 20.🔍 Which is the odd one out? (a) stop if a part gets hot (b) keep drinks far away (c) build with an adult near (d) use mains for a project
21. 21.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
22. 22.What does a push button do? (a) slides side to side (b) works only while pressed (c) closes when tipped over (d) stays where you flip it
23. 23.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
24. 24.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
25. 25.True or false: a steel spoon is an insulator. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) a cotton thread (b) a rubber band (c) an iron nail (d) a woollen thread
27. 27.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
28. 28.💡 4 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 2 glow? (a) Yes (b) No
29. 29.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) wire (b) capacitor (c) battery (d) diode
30. 30.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
31. 31.💡 2 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 2 are taken out of their holders. How many bulbs glow?
32. 32.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.🔘 Which kind of switch works only while pressed? (a) a push button (b) a reed switch (c) a toggle switch (d) a tilt switch
34. 34.True or false: a dry cork is an insulator. (a) False (b) True
35. 35.True or false: a toaster mainly makes movement. (a) False (b) True
36. 36.🔋 How many 1.2 V cells must be joined in series to give 6 V?
37. 37.⚡ What does a table fan mainly change electricity into? (a) light (b) sound (c) movement (d) heat
38. 38.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
39. 39.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
40. 40.True or false: to dry your hands first is not safe. (a) True (b) False

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