Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 550 · 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 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 1 glow? (a) Yes (b) No
2. 2.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
3. 3.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
4. 4.🔍 Which is the odd one out? (a) use small battery cells (b) climb an electric pole (c) throw cells in a fire (d) poke things in a socket
5. 5.What does a toggle switch do? (a) stays where you flip it (b) works only while pressed (c) slides side to side (d) springs back when let go
6. 6.💡 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. How many bulbs glow?
7. 7.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
9. 9.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) a bigger voltage (d) no voltage
10. 10.💡 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 2 and 4 are taken out of their holders. Does bulb 6 glow? (a) Yes (b) No
11. 11.🔋 3 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
12. 12.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
13. 13.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) stay away from pylons (b) take cells out after use (c) dry your hands first (d) touch a switch when wet
15. 15.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
16. 16.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) sound energy (d) wind energy
17. 17.Which of these uses electricity? (a) a generator (b) a cell (c) an air conditioner (d) a power station
18. 18.Which of these is not safe? (a) stay away from pylons (b) stop if a part gets hot (c) touch a switch when wet (d) dry your hands first
19. 19.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
20. 20.Which of these mainly makes movement? (a) a loudspeaker (b) a table fan (c) a rice cooker (d) a tube light
21. 21.⚡ What does a toaster mainly change electricity into? (a) movement (b) sound (c) heat (d) light
22. 22.🔍 Which is the odd one out? (a) a doorbell (b) a siren (c) an electric iron (d) a school bell
23. 23.🔍 Which is the odd one out? (a) stay away from pylons (b) build with an adult near (c) use small battery cells (d) fly a kite near wires
24. 24.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) junction (b) voltmeter (c) capacitor (d) LED
25. 25.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) photons (c) dust particles (d) water drops
26. 26.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
27. 27.⚡ What does a tube light mainly change electricity into? (a) sound (b) light (c) heat (d) movement
28. 28.What does a tilt switch do? (a) works only while pressed (b) closes when tipped over (c) flips up or down (d) closes near a magnet
29. 29.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
30. 30.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) bulbs share the voltage (d) many paths for current
31. 31.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
32. 32.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a tilt switch (c) a push button (d) a toggle switch
33. 33.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) cut them open (d) bury them in soil
34. 34.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) a complete loop (d) one loose end
35. 35.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔋 How many 2 V cells must be joined in series to give 10 V?
37. 37.🔍 Which is the odd one out? (a) touch a fallen wire (b) build with an adult near (c) stay away from pylons (d) use small battery cells
38. 38.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) both of them (d) only one
39. 39.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) one bulb out, all go out (d) one out, the rest glow
40. 40.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False

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