Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 97 · 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: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
2. 2.Which of these is not safe? (a) build with an adult near (b) dry your hands first (c) use small battery cells (d) open a phone charger
3. 3.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
4. 4.🔘 When a switch is ON, the circuit is … (a) broken (b) cut (c) open (d) closed
5. 5.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
6. 6.🔘 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
7. 7.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
8. 8.💡 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
9. 9.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
10. 10.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a fuse or MCB (c) a long wire (d) a plug top
11. 11.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
12. 12.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) False (b) True
13. 13.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) wait and watch (c) pour water on them (d) shout for an adult
14. 14.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔍 Which is the odd one out? (a) climb an electric pole (b) fly a kite near wires (c) use mains for a project (d) dry your hands first
16. 16.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.🔘 What does a switch do in a circuit? (a) changes the voltage (b) makes electricity (c) stores current (d) opens or closes the loop
18. 18.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a school bell (b) an electric kettle (c) a buzzer (d) a siren
20. 20.🔦 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 steel spoon. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
22. 22.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a cell (c) a switch that is ON (d) a conductor
23. 23.What does a tilt switch do? (a) stays where you flip it (b) closes when tipped over (c) flips up or down (d) springs back when let go
24. 24.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
25. 25.True or false: “a single current path” is true of a series circuit. (a) True (b) False
26. 26.True or false: a push button flips up or down. (a) True (b) False
27. 27.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
28. 28.🔍 Which is the odd one out? (a) a safety pin (b) a wooden stick (c) a graphite rod (d) an iron nail
29. 29.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the bare end (d) the steel shaft
30. 30.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
31. 31.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
32. 32.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
33. 33.Which drawing is the symbol for a switch? (a) triangle, bar and arrows (b) a circle with an X in it (c) a line lifted at a gap (d) two or more cell symbols
34. 34.Which of these means the circuit is closed? (a) all wires are joined (b) a wire is cut (c) the bulb is unscrewed (d) the switch is OFF
35. 35.True or false: a rubber eraser is an insulator. (a) True (b) False
36. 36.Which of these is a conductor? (a) aluminium foil (b) a dry cork (c) a glass marble (d) a wooden stick
37. 37.Which of these is a conductor? (a) a plastic ruler (b) a paper strip (c) a cotton thread (d) a steel spoon
38. 38.True or false: triangle against a bar is the symbol for a diode. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) build with an adult near (b) stop if a part gets hot (c) take cells out after use (d) throw cells in a fire
40. 40.Which drawing is the symbol for a motor? (a) a long and a short line (b) a straight line (c) a circle with M inside (d) many long-short pairs

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