Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 506 · 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.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) friction (c) sound (d) a magnet
2. 2.Which of these is safe? (a) throw cells in a fire (b) use small battery cells (c) touch a switch when wet (d) poke things in a socket
3. 3.True or false: a woollen thread is a conductor. (a) True (b) False
4. 4.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
5. 5.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) nuclear energy (c) sound energy (d) wind energy
6. 6.🔋 3 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
7. 7.True or false: a safety pin is a conductor. (a) False (b) True
8. 8.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
9. 9.🔋 What is a battery? (a) two or more cells joined (b) one single wire (c) a kind of bulb (d) a switch with a lid
10. 10.⚡ What does a room heater mainly change electricity into? (a) heat (b) movement (c) sound (d) light
11. 11.🔦 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
12. 12.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
13. 13.🔍 Which is the odd one out? (a) build with an adult near (b) stop if a part gets hot (c) open a phone charger (d) fly kites in open fields
14. 14.Which of these means the circuit is closed? (a) the switch is ON (b) a wire is cut (c) a wire has come loose (d) a cell is taken out
15. 15.Which of these is safe? (a) use a cable with cuts (b) throw cells in a fire (c) build with an adult near (d) use mains for a project
16. 16.🔍 Which is the odd one out? (a) a steel coin (b) a dry cork (c) a paper strip (d) a wooden stick
17. 17.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) a small battery pack (d) an inverter socket
18. 18.True or false: a dry cork is an insulator. (a) False (b) True
19. 19.🔋 How many 3 V cells must be joined in series to give 12 V?
20. 20.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) voltmeter (b) bulb (c) battery (d) diode
21. 21.What does a toggle switch do? (a) flips up or down (b) springs back when let go (c) closes when tipped over (d) works only while pressed
22. 22.True or false: a rubber eraser is a conductor. (a) True (b) False
23. 23.Which of these is not safe? (a) fly kites in open fields (b) dry your hands first (c) stay away from pylons (d) touch a fallen wire
24. 24.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) the same voltage (d) a bigger voltage
25. 25.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
26. 26.True or false: an electric drill mainly makes movement. (a) True (b) False
27. 27.🔦 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 plastic straw. Does the bulb glow? (a) No (b) Yes
28. 28.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
29. 29.Which of these is a conductor? (a) a dry cork (b) a ceramic cup (c) a steel coin (d) a plastic straw
30. 30.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
31. 31.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a reed switch (c) a slide switch (d) a push button
32. 32.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) it is just untidy (d) water makes it cold
33. 33.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) bulbs share the voltage (d) one out, the rest glow
34. 34.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) switch (b) battery (c) motor (d) bulb
36. 36.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
37. 37.True or false: two or more cell symbols is the symbol for a bulb. (a) False (b) True
38. 38.True or false: to dry your hands first is safe. (a) False (b) True
39. 39.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a safety pin (b) a ceramic cup (c) a plastic ruler (d) a wooden stick

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