Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 285 · 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.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
3. 3.What does a toggle switch do? (a) closes when tipped over (b) stays where you flip it (c) closes near a magnet (d) works only while pressed
4. 4.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
5. 5.Which of these is true of a parallel circuit? (a) a single current path (b) each gets the full volts (c) bulbs share the voltage (d) a break stops every bulb
6. 6.🔍 Which is the odd one out? (a) a copper wire (b) a brass key (c) a paper strip (d) a safety pin
7. 7.True or false: an electric toy car mainly gives out light. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) a safety pin (b) a steel spoon (c) a metal paper clip (d) a plastic straw
9. 9.Which of these uses electricity? (a) a power station (b) a television (c) a battery (d) a solar panel
10. 10.🔋 3 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
11. 11.Which of these mainly gives out light? (a) an electric iron (b) a school bell (c) a water heater (d) a street light
12. 12.🔦 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) No (b) Yes
13. 13.True or false: to stay away from pylons is safe. (a) True (b) False
14. 14.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they all go out (d) they explode
15. 15.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to make it colourful (d) to hide the circuit
16. 16.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) a complete loop (d) one loose end
17. 17.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) both lines (d) the shorter line
18. 18.🔋 5 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
20. 20.Which of these gives us electricity? (a) a power station (b) a refrigerator (c) a mobile phone (d) a television
21. 21.🔁 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) only one (d) both of them
22. 22.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) open (d) broken
23. 23.True or false: a circle with V inside is the symbol for a switch. (a) True (b) False
24. 24.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
26. 26.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
27. 27.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
28. 28.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
30. 30.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
31. 31.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
33. 33.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
35. 35.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
37. 37.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) when either is ON (d) only when both are ON
38. 38.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) friction (d) sound
39. 39.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
40. 40.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False

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