Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 761 · 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.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) a kind of bulb (d) two or more cells joined
2. 2.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) photons (d) water drops
3. 3.💡 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
4. 4.🔍 Which is the odd one out? (a) an iron nail (b) a wooden stick (c) a plastic straw (d) a rubber band
5. 5.Which of these mainly makes movement? (a) an electric iron (b) an electric drill (c) a night lamp (d) a water heater
6. 6.True or false: to use mains for a project is not safe. (a) True (b) False
7. 7.Which drawing is the symbol for a battery? (a) a long and a short line (b) two or more cell symbols (c) a circle with M inside (d) a circle with an X in it
8. 8.🔦 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 wooden stick. Does the bulb glow? (a) No (b) Yes
9. 9.⚡ What does an exhaust fan mainly change electricity into? (a) sound (b) heat (c) movement (d) light
10. 10.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
11. 11.True or false: an exhaust fan mainly makes sound. (a) True (b) False
12. 12.Which drawing is the symbol for a resistor? (a) a plain rectangle (b) a circle with M inside (c) many long-short pairs (d) a long and a short line
13. 13.Which of these is true of a series circuit? (a) each gets the full volts (b) bulbs share the voltage (c) many paths for current (d) one out, the rest glow
14. 14.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) one out, the rest glow (d) a single current path
15. 15.🔘 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 ON and C is OFF. Does the bulb glow? (a) No (b) Yes
16. 16.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) wind energy (c) light energy (d) sound energy
17. 17.True or false: a toggle switch closes when tipped over. (a) True (b) False
18. 18.💡 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
19. 19.True or false: a circle with A inside is the symbol for a wire. (a) False (b) True
20. 20.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a tilt switch (c) a toggle switch (d) a push button
22. 22.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) one bulb out, all go out (d) one out, the rest glow
23. 23.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a parallel circuit (c) an open circuit (d) a safe circuit
24. 24.🔍 Which is the odd one out? (a) build with an adult near (b) open a phone charger (c) keep drinks far away (d) use small battery cells
25. 25.🔍 Which is the odd one out? (a) a plastic straw (b) a copper wire (c) a dry cork (d) a ceramic cup
26. 26.💡 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 1 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
27. 27.Which of these is an insulator? (a) a copper wire (b) aluminium foil (c) a metal paper clip (d) a wooden stick
28. 28.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
29. 29.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) many paths for current (c) a single current path (d) bulbs share the voltage
30. 30.🔍 Which is the odd one out? (a) a table fan (b) an exhaust fan (c) an electric drill (d) an LED lamp
31. 31.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
32. 32.True or false: an LED lamp mainly makes sound. (a) True (b) False
33. 33.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is ON. Does the bulb glow? (a) Yes (b) No
34. 34.💡 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 3 is taken out of its holder. How many bulbs glow?
35. 35.🔘 A bulb and a cell are joined through 4 switches on 4 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?
36. 36.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) wire (c) capacitor (d) LED
37. 37.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
38. 38.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
39. 39.True or false: to take cells out after use is not safe. (a) True (b) False
40. 40.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined

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