Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 411 · 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.💡 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
2. 2.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
3. 3.Which of these is an insulator? (a) aluminium foil (b) a brass key (c) a metal paper clip (d) a plastic straw
4. 4.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
5. 5.💡 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 4 and 6 are taken out of their holders. How many bulbs glow?
6. 6.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
7. 7.True or false: to take cells out after use is safe. (a) False (b) True
8. 8.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) a line lifted at a gap (c) triangle against a bar (d) many long-short pairs
9. 9.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.What does a reed switch do? (a) springs back when let go (b) closes near a magnet (c) stays where you flip it (d) closes when tipped over
11. 11.True or false: a doorbell mainly makes sound. (a) True (b) False
12. 12.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
13. 13.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
14. 14.✏️ In a circuit diagram, which part is drawn as a straight line? (a) diode (b) junction (c) wire (d) LED
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.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) ammeter (b) junction (c) resistor (d) cell
17. 17.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a push button (c) a reed switch (d) a toggle switch
18. 18.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) wavy lines (d) straight lines
19. 19.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
20. 20.Which of these is a conductor? (a) a woollen thread (b) a cotton thread (c) a copper wire (d) a plastic ruler
21. 21.True or false: to use mains for a project is not safe. (a) False (b) True
22. 22.⚡ What does a street light mainly change electricity into? (a) heat (b) movement (c) sound (d) light
23. 23.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V
24. 24.Which of these uses electricity? (a) a power station (b) a computer (c) a wind turbine (d) a cell
25. 25.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) switch (b) resistor (c) bulb (d) voltmeter
26. 26.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
27. 27.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
28. 28.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
29. 29.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a plastic ruler (d) a safety pin
30. 30.True or false: many long-short pairs is the symbol for a capacitor. (a) False (b) True
31. 31.True or false: a paper strip is a conductor. (a) True (b) False
32. 32.Which of these is true of a parallel circuit? (a) used in house wiring (b) bulbs share the voltage (c) a single current path (d) one bulb out, all go out
33. 33.Which of these means the circuit is open? (a) the bulb is unscrewed (b) the switch is ON (c) the loop is complete (d) all wires are joined
34. 34.Which of these mainly makes sound? (a) a ceiling fan (b) a siren (c) a water heater (d) a torch
35. 35.What does a push button do? (a) closes near a magnet (b) stays where you flip it (c) slides side to side (d) works only while pressed
36. 36.True or false: “a single current path” is true of a series circuit. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) fly a kite near wires (b) dry your hands first (c) stop if a part gets hot (d) keep drinks far away
38. 38.🔍 Which is the odd one out? (a) a room heater (b) a table fan (c) an electric iron (d) an electric kettle
39. 39.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic makes current (d) plastic is a conductor
40. 40.Which drawing is the symbol for a resistor? (a) a circle with V inside (b) triangle against a bar (c) a small empty box (d) two equal parallel lines

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