Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 683 · 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.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
2. 2.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
3. 3.True or false: to use small battery cells is not safe. (a) True (b) False
4. 4.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
5. 5.What does a tilt switch do? (a) closes when tipped over (b) springs back when let go (c) stays where you flip it (d) slides side to side
6. 6.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
7. 7.What does a slide switch do? (a) slides side to side (b) closes near a magnet (c) springs back when let go (d) flips up or down
8. 8.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) a cell is taken out (d) all wires are joined
9. 9.⚠️ 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
10. 10.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
11. 11.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
12. 12.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) both of them (d) none
13. 13.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
14. 14.Which of these uses electricity? (a) a generator (b) a television (c) a power station (d) a battery
15. 15.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
16. 16.True or false: a push button slides side to side. (a) True (b) False
17. 17.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
18. 18.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
19. 19.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
20. 20.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
21. 21.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
22. 22.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.Which of these mainly makes sound? (a) a toaster (b) a traffic signal (c) an exhaust fan (d) a loudspeaker
24. 24.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
25. 25.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
26. 26.⚡ What does a street light mainly change electricity into? (a) sound (b) movement (c) light (d) heat
27. 27.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
28. 28.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
29. 29.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) bulb (b) diode (c) cell (d) switch
30. 30.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
31. 31.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
33. 33.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
34. 34.True or false: a ceramic cup is a conductor. (a) True (b) False
35. 35.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
36. 36.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) used in house wiring (d) one out, the rest glow
37. 37.Which drawing is the symbol for a wire? (a) one tall, one short bar (b) a line lifted at a gap (c) a plain rectangle (d) a straight line
38. 38.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
39. 39.🔋 5 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
40. 40.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed

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