Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 199 · 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: to use mains for a project is safe. (a) True (b) False
2. 2.🔋 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)? =
3. 3.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
4. 4.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) voltmeter (b) switch (c) ammeter (d) bulb
5. 5.What does a push button do? (a) closes when tipped over (b) stays where you flip it (c) springs back when let go (d) flips up or down
6. 6.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
7. 7.True or false: a tube light mainly gives out light. (a) True (b) False
8. 8.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) changes the voltage (c) stores current (d) makes electricity
9. 9.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) it is just untidy (d) water carries current
11. 11.🔍 Which is the odd one out? (a) use small battery cells (b) use mains for a project (c) keep drinks far away (d) build with an adult near
12. 12.True or false: a school bell mainly gives out light. (a) True (b) False
13. 13.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one out, the rest glow (d) each gets the full volts
15. 15.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) used in house wiring (c) a single current path (d) one bulb out, all go out
16. 16.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
17. 17.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
19. 19.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
20. 20.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
21. 21.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) resistor (b) battery (c) bulb (d) cell
22. 22.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) sound (c) movement (d) light
23. 23.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
24. 24.Which of these is true of a series circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) one out, the rest glow (d) used in house wiring
25. 25.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a fuse or MCB (d) a long wire
27. 27.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) resistor (b) cell (c) LED (d) voltmeter
29. 29.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) two or more cells joined (d) one single wire
30. 30.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) sound energy (c) light energy (d) chemical energy
31. 31.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a broken path (d) a complete loop
32. 32.🔍 Which is the odd one out? (a) use small battery cells (b) poke things in a socket (c) dry your hands first (d) stay away from pylons
33. 33.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
34. 34.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
35. 35.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
36. 36.Which of these is a conductor? (a) a glass marble (b) a safety pin (c) a plastic ruler (d) a woollen thread
37. 37.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) both lines (d) the shorter line
38. 38.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) a wire has come loose
39. 39.What does a toggle switch do? (a) flips up or down (b) slides side to side (c) closes when tipped over (d) works only while pressed
40. 40.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)

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