Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 583 · 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.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) own switch for each bulb (c) bulbs share the voltage (d) one bulb out, all go out
2. 2.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
3. 3.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
4. 4.Which of these is true of a series circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) many paths for current (d) each gets the full volts
5. 5.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
6. 6.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) the bulb is unscrewed (d) all wires are joined
7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
8. 8.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a push button (c) a reed switch (d) a toggle switch
9. 9.True or false: a torch mainly makes sound. (a) True (b) False
10. 10.🔦 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
11. 11.💡 4 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 4 glow? (a) No (b) Yes
12. 12.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
14. 14.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a safety pin. Does the bulb glow? (a) No (b) Yes
15. 15.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
16. 16.Which of these means the circuit is open? (a) the switch is ON (b) a wire is cut (c) the loop is complete (d) all wires are joined
17. 17.🔍 Which is the odd one out? (a) a street light (b) a mixer grinder (c) an electric drill (d) a ceiling fan
18. 18.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
19. 19.🔘 A bulb and a cell are joined through 5 switches on 5 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
20. 20.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) an inverter socket (d) a small battery pack
21. 21.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
22. 22.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) battery (b) bulb (c) diode (d) switch
23. 23.Which of these is not safe? (a) use small battery cells (b) build with an adult near (c) take cells out after use (d) climb an electric pole
24. 24.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
25. 25.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) light (c) heat (d) sound
26. 26.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) only when both are ON (d) when either is ON
27. 27.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
28. 28.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) capacitor (b) motor (c) junction (d) LED
29. 29.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
30. 30.🔘 What does a switch do in a circuit? (a) stores current (b) makes electricity (c) changes the voltage (d) opens or closes the loop
31. 31.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) No (b) Yes
33. 33.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
34. 34.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
36. 36.Which of these is an insulator? (a) a rubber eraser (b) a steel coin (c) a steel spoon (d) a metal paper clip
37. 37.Which of these is an insulator? (a) a metal paper clip (b) a rubber band (c) a steel spoon (d) an iron nail
38. 38.💡 2 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. All the bulbs are in place. How many bulbs glow?
39. 39.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when both are OFF (d) when either is ON
40. 40.🔋 6 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)? =

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