Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 794 · 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.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) electric current (d) a magnet
3. 3.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
4. 4.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
5. 5.Which of these gives us electricity? (a) a computer (b) an air conditioner (c) a wind turbine (d) a mobile phone
6. 6.True or false: a glass marble is a conductor. (a) False (b) True
7. 7.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
9. 9.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
10. 10.What does a toggle switch do? (a) stays where you flip it (b) closes near a magnet (c) slides side to side (d) works only while pressed
11. 11.True or false: a steel spoon is an insulator. (a) False (b) True
12. 12.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
13. 13.🔍 Which is the odd one out? (a) a graphite rod (b) a plastic ruler (c) a safety pin (d) a copper wire
14. 14.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
15. 15.True or false: if the loop is complete, the circuit is open and no current flows. (a) False (b) True
16. 16.🔋 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)? =
17. 17.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) photons (d) electrons
18. 18.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
19. 19.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) switch (b) ammeter (c) resistor (d) wire
20. 20.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a plug top (d) a bulb
21. 21.Which of these mainly makes sound? (a) an electric drill (b) a mixer grinder (c) a night lamp (d) a loudspeaker
22. 22.🔍 Which is the odd one out? (a) keep drinks far away (b) throw cells in a fire (c) use small battery cells (d) build with an adult near
23. 23.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
26. 26.Which of these uses electricity? (a) a bicycle dynamo (b) a generator (c) a refrigerator (d) a battery
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.Which of these is an insulator? (a) a steel coin (b) an iron nail (c) a plastic ruler (d) a copper wire
29. 29.Which of these is true of a series circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) many paths for current (d) own switch for each bulb
30. 30.What does a push button do? (a) closes when tipped over (b) slides side to side (c) works only while pressed (d) flips up or down
31. 31.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.🔍 Which is the odd one out? (a) throw cells in a fire (b) climb an electric pole (c) stay away from pylons (d) poke things in a socket
33. 33.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) glass (d) plastic
34. 34.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) diode (b) motor (c) ammeter (d) LED
36. 36.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
37. 37.True or false: a steel coin is an insulator. (a) True (b) False
38. 38.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
39. 39.True or false: a reed switch closes near a magnet. (a) True (b) False
40. 40.Which drawing is the symbol for an ammeter? (a) a plain rectangle (b) one tall, one short bar (c) two or more cell symbols (d) a circle with A inside

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