Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 322 · 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.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
2. 2.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
3. 3.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) none (d) one for each bulb
4. 4.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
5. 5.Which of these uses electricity? (a) a cell (b) a generator (c) a television (d) a wind turbine
6. 6.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a push button
7. 7.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
8. 8.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
9. 9.Which of these gives us electricity? (a) a refrigerator (b) a washing machine (c) a wind turbine (d) a television
10. 10.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
11. 11.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
12. 12.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
13. 13.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) one bulb out, all go out (d) one out, the rest glow
14. 14.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
15. 15.⚡ What does a siren mainly change electricity into? (a) light (b) heat (c) movement (d) sound
16. 16.Which of these is not safe? (a) throw cells in a fire (b) build with an adult near (c) use small battery cells (d) fly kites in open fields
17. 17.Which drawing is the symbol for a cell? (a) a circle with A inside (b) a straight line (c) a circle with V inside (d) a long and a short line
18. 18.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
19. 19.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
20. 20.🔦 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 plastic ruler. Does the bulb glow? (a) No (b) Yes
21. 21.Which drawing is the symbol for a voltmeter? (a) a circle with a cross (b) a long and a short line (c) one tall, one short bar (d) a circle with V inside
22. 22.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a tilt switch (c) a reed switch (d) a toggle switch
23. 23.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
24. 24.True or false: to throw cells in a fire is not safe. (a) True (b) False
25. 25.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
26. 26.True or false: a safety pin is a conductor. (a) False (b) True
27. 27.Which of these uses electricity? (a) a generator (b) a computer (c) a power station (d) a solar panel
28. 28.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) voltmeter (b) motor (c) cell (d) resistor
29. 29.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.True or false: to open a phone charger is safe. (a) False (b) True
31. 31.🔋 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)? =
32. 32.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
33. 33.⚡ What does a water heater mainly change electricity into? (a) heat (b) sound (c) light (d) movement
34. 34.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) dust particles (c) electrons (d) water drops
35. 35.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
36. 36.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
37. 37.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
39. 39.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
40. 40.True or false: to stay away from pylons is not safe. (a) True (b) False

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