Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 528 · 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.True or false: “a single current path” is true of a series circuit. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a school bell (b) a buzzer (c) a doorbell (d) a traffic signal
3. 3.Which drawing is the symbol for a junction? (a) triangle against a bar (b) a dot where wires meet (c) triangle, bar and arrows (d) a long and a short line
4. 4.💡 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 5 are taken out of their holders. How many bulbs glow?
5. 5.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) opens or closes the loop (d) changes the voltage
6. 6.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
7. 7.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) neither line (d) the longer line
8. 8.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
9. 9.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
10. 10.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
11. 11.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
12. 12.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) an inverter socket (d) a mains extension board
13. 13.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) diode (b) switch (c) resistor (d) battery
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
15. 15.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
16. 16.What does a tilt switch do? (a) flips up or down (b) slides side to side (c) stays where you flip it (d) closes when tipped over
17. 17.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
19. 19.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
20. 20.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
21. 21.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
22. 22.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
23. 23.True or false: to keep drinks far away is not safe. (a) False (b) True
24. 24.What does a reed switch do? (a) springs back when let go (b) stays where you flip it (c) closes near a magnet (d) slides side to side
25. 25.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
26. 26.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pour water on them (c) shout for an adult (d) pull them by the hand
28. 28.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
29. 29.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
30. 30.Which of these is not safe? (a) use small battery cells (b) touch a fallen wire (c) keep drinks far away (d) fly kites in open fields
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.True or false: a table fan mainly makes sound. (a) True (b) False
33. 33.Which of these uses electricity? (a) a water pump (b) a power station (c) a cell (d) a generator
34. 34.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
35. 35.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) own switch for each bulb (d) bulbs share the voltage
36. 36.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
37. 37.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) diode (b) bulb (c) LED (d) ammeter
38. 38.⚡ What does a tube light mainly change electricity into? (a) movement (b) heat (c) light (d) sound
39. 39.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
40. 40.🔍 Which is the odd one out? (a) a copper wire (b) a safety pin (c) a graphite rod (d) a wooden stick

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