Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 147 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
3. 3.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
4. 4.💡 4 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 2 is taken out of its holder. How many bulbs glow?
5. 5.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) one out, the rest glow
6. 6.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
7. 7.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
8. 8.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) one tall, one short bar (c) a plain rectangle (d) a dot where wires meet
9. 9.🔦 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 wooden stick. Does the bulb glow? (a) Yes (b) No
10. 10.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
11. 11.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a metal paper clip. Does the bulb glow? (a) No (b) Yes
12. 12.💡 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) the same (c) brighter
13. 13.🔦 A circuit has a used-up (dead) 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 wooden stick. Does the bulb glow? (a) Yes (b) No
14. 14.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb
15. 15.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) it does not matter (c) only one (d) none
16. 16.What does a reed switch do? (a) slides side to side (b) closes near a magnet (c) springs back when let go (d) stays where you flip it
17. 17.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
18. 18.Which of these gives us electricity? (a) a television (b) a water pump (c) a cell (d) a refrigerator
19. 19.Which of these is a conductor? (a) a glass marble (b) a plastic straw (c) a wooden stick (d) a graphite rod
20. 20.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
21. 21.True or false: a rubber eraser is an insulator. (a) False (b) True
22. 22.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
23. 23.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
24. 24.True or false: a plastic straw is an insulator. (a) True (b) False
25. 25.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
26. 26.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.🔍 Which is the odd one out? (a) a paper strip (b) a plastic ruler (c) a wooden stick (d) aluminium foil
28. 28.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
30. 30.🔍 Which is the odd one out? (a) a loudspeaker (b) a doorbell (c) a buzzer (d) a night lamp
31. 31.True or false: a slide switch flips up or down. (a) False (b) True
32. 32.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
33. 33.Which of these is an insulator? (a) a metal paper clip (b) aluminium foil (c) an iron nail (d) a rubber band
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) switch (b) battery (c) voltmeter (d) bulb
36. 36.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.What does a push button do? (a) slides side to side (b) closes when tipped over (c) springs back when let go (d) closes near a magnet
38. 38.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
39. 39.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
40. 40.⚡ What does a night lamp mainly change electricity into? (a) sound (b) light (c) movement (d) heat

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