Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 430 · 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.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.What does a slide switch do? (a) stays where you flip it (b) closes when tipped over (c) flips up or down (d) slides side to side
3. 3.🔦 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) Yes (b) No
4. 4.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
5. 5.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
6. 6.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) each gets the full volts (d) a single current path
7. 7.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
8. 8.⚡ What does a toaster mainly change electricity into? (a) movement (b) sound (c) heat (d) light
9. 9.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
10. 10.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
11. 11.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
12. 12.Which drawing is the symbol for a junction? (a) one tall, one short bar (b) a long and a short line (c) a dot where wires meet (d) two equal parallel lines
13. 13.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) cut (d) broken
14. 14.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
16. 16.🔍 Which is the odd one out? (a) a copper wire (b) a brass key (c) a steel spoon (d) a rubber band
17. 17.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) an open circuit (c) a closed circuit (d) a series circuit
18. 18.🔍 Which is the odd one out? (a) stop if a part gets hot (b) stay away from pylons (c) keep drinks far away (d) poke things in a socket
19. 19.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) no voltage (d) a bigger voltage
20. 20.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
21. 21.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
22. 22.True or false: a toggle switch stays where you flip it. (a) True (b) False
23. 23.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
25. 25.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
26. 26.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
27. 27.⚡ What does an electric iron mainly change electricity into? (a) heat (b) sound (c) light (d) movement
28. 28.🔍 Which is the odd one out? (a) a school bell (b) a mixer grinder (c) a table fan (d) a ceiling fan
29. 29.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
30. 30.🔋 4 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
31. 31.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.🔘 Which kind of switch springs back when let go? (a) a push button (b) a tilt switch (c) a reed switch (d) a slide switch
33. 33.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
34. 34.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
35. 35.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
36. 36.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
37. 37.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
39. 39.Which drawing is the symbol for a diode? (a) triangle against a bar (b) a line lifted at a gap (c) a circle with M inside (d) a plain rectangle
40. 40.Which of these uses electricity? (a) a computer (b) a battery (c) a power station (d) a cell

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