Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 750 · 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: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
2. 2.Which of these is a conductor? (a) a dry cork (b) a woollen thread (c) a safety pin (d) a rubber eraser
3. 3.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) wire (b) switch (c) cell (d) voltmeter
4. 4.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) movement energy (c) chemical energy (d) light energy
5. 5.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) switch (b) capacitor (c) battery (d) junction
6. 6.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
7. 7.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
8. 8.Which drawing is the symbol for a diode? (a) one tall, one short bar (b) a circle with a cross (c) two equal parallel lines (d) triangle against a bar
9. 9.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
10. 10.Which of these is safe? (a) touch a switch when wet (b) fly a kite near wires (c) take cells out after use (d) touch a fallen wire
11. 11.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
13. 13.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) cell (c) voltmeter (d) junction
14. 14.What does a toggle switch do? (a) closes when tipped over (b) works only while pressed (c) springs back when let go (d) flips up or down
15. 15.🔦 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) Yes (b) No
16. 16.Which drawing is the symbol for an LED? (a) triangle against a bar (b) a circle with an X in it (c) triangle, bar and arrows (d) a long and a short line
17. 17.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) so all go off together (d) to make bulbs dim
18. 18.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
20. 20.True or false: a line lifted at a gap is the symbol for a voltmeter. (a) False (b) True
21. 21.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) two or more cell symbols (c) a straight line (d) triangle, bar and arrows
22. 22.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) stores current (c) makes electricity (d) changes the voltage
23. 23.True or false: a push button slides side to side. (a) True (b) False
24. 24.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No
26. 26.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
27. 27.True or false: a rice cooker mainly gives out heat. (a) False (b) True
28. 28.🔦 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 woollen thread. Does the bulb glow? (a) No (b) Yes
29. 29.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
30. 30.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
31. 31.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
32. 32.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) a wire is cut (d) the switch is ON
33. 33.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) water makes it cold (c) it is just untidy (d) it spoils the paint
34. 34.Which of these is safe? (a) use a cable with cuts (b) touch a switch when wet (c) throw cells in a fire (d) use small battery cells
35. 35.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
36. 36.💡 6 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 6 glow? (a) No (b) Yes
37. 37.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) motor (b) voltmeter (c) battery (d) bulb
38. 38.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
39. 39.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
40. 40.🔍 Which is the odd one out? (a) a metal paper clip (b) a brass key (c) aluminium foil (d) a plastic straw

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