Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 40 · 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: to take cells out after use is safe. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) open a phone charger (b) poke things in a socket (c) take cells out after use (d) touch a switch when wet
3. 3.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
4. 4.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
6. 6.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is an insulator (d) plastic is a conductor
7. 7.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) a single current path (d) many paths for current
8. 8.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) broken (d) closed
9. 9.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
10. 10.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
11. 11.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
12. 12.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.Which of these is a conductor? (a) a plastic ruler (b) a wooden stick (c) a graphite rod (d) a rubber eraser
14. 14.Which of these is an insulator? (a) a safety pin (b) a rubber band (c) a copper wire (d) aluminium foil
15. 15.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) junction (b) voltmeter (c) ammeter (d) resistor
16. 16.🔘 Which kind of switch springs back when let go? (a) a push button (b) a toggle switch (c) a tilt switch (d) a reed switch
17. 17.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.🔍 Which is the odd one out? (a) take cells out after use (b) touch a fallen wire (c) use small battery cells (d) stop if a part gets hot
19. 19.True or false: a safety pin is a conductor. (a) False (b) True
20. 20.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
21. 21.💡 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) the same (c) brighter
22. 22.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a switch with a lid (d) a kind of bulb
23. 23.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
24. 24.True or false: a woollen thread is a conductor. (a) False (b) True
25. 25.🔘 A bulb and a cell are joined through 2 switches on 2 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?
26. 26.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
27. 27.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) both of them (c) only one (d) none
28. 28.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) the same voltage (d) a smaller voltage
29. 29.Which of these gives us electricity? (a) a water pump (b) a television (c) a solar panel (d) an air conditioner
30. 30.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
31. 31.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
32. 32.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
34. 34.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
35. 35.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
36. 36.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
37. 37.🔦 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 safety pin. Does the bulb glow? (a) No (b) Yes
38. 38.🔘 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 OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
39. 39.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) electrons (d) photons
40. 40.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids