Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 760 · 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 must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
2. 2.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
3. 3.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
5. 5.Which of these is not safe? (a) stay away from pylons (b) keep drinks far away (c) touch a switch when wet (d) build with an adult near
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
7. 7.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a slide switch
8. 8.🔍 Which is the odd one out? (a) a rubber band (b) a woollen thread (c) a wooden stick (d) a steel spoon
9. 9.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a slide switch
10. 10.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
11. 11.True or false: a slide switch flips up or down. (a) True (b) False
12. 12.Which drawing is the symbol for an ammeter? (a) one tall, one short bar (b) a line lifted at a gap (c) a circle with A inside (d) a circle with V inside
13. 13.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
14. 14.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
15. 15.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
16. 16.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
17. 17.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) movement energy
18. 18.🔍 Which is the odd one out? (a) climb an electric pole (b) fly kites in open fields (c) throw cells in a fire (d) use a cable with cuts
19. 19.True or false: to keep drinks far away is not safe. (a) True (b) False
20. 20.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
21. 21.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
22. 22.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
23. 23.What does a push button do? (a) slides side to side (b) closes when tipped over (c) springs back when let go (d) stays where you flip it
24. 24.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
25. 25.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) diode (b) bulb (c) motor (d) capacitor
26. 26.💡 4 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
27. 27.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
28. 28.🔋 How many 1.5 V cells must be joined in series to give 12 V?
29. 29.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when either is ON (d) when both are ON
30. 30.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
31. 31.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
32. 32.True or false: to use small battery cells is not safe. (a) True (b) False
33. 33.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
34. 34.💡 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. Bulb 3 is taken out of its holder. How many bulbs glow?
35. 35.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
36. 36.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) an open circuit (d) a safe circuit
37. 37.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
38. 38.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
39. 39.✏️ 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
40. 40.Which of these is a conductor? (a) a wooden stick (b) an iron nail (c) a dry cork (d) a woollen thread

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