Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 980 · 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 must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a complete loop (d) a broken path
2. 2.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) light energy (c) sound energy (d) chemical energy
3. 3.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
4. 4.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
5. 5.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
6. 6.Which of these gives us electricity? (a) a solar panel (b) a computer (c) a water pump (d) a refrigerator
7. 7.True or false: a paper strip is an insulator. (a) False (b) True
8. 8.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
9. 9.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
11. 11.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
12. 12.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) symbols are heavier (d) to make it colourful
13. 13.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
14. 14.🔋 4 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)? =
15. 15.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) an inverter socket (d) a wall socket
16. 16.Which of these means the circuit is open? (a) a wire has come loose (b) the switch is ON (c) all wires are joined (d) the loop is complete
17. 17.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) double the voltage (d) half the voltage
18. 18.Which of these mainly makes sound? (a) a street light (b) an LED lamp (c) a doorbell (d) a night lamp
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) cell (b) battery (c) ammeter (d) diode
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
21. 21.True or false: to take cells out after use is safe. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a toaster (b) an electric kettle (c) a rice cooker (d) a night lamp
23. 23.⚡ What does an exhaust fan mainly change electricity into? (a) sound (b) movement (c) heat (d) light
24. 24.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when either is ON (d) when both are ON
25. 25.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
26. 26.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
27. 27.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
28. 28.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) electric current (d) friction
29. 29.💡 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
30. 30.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) it spoils the paint (c) water carries current (d) water makes it cold
31. 31.Which of these is safe? (a) use a cable with cuts (b) fly a kite near wires (c) throw cells in a fire (d) fly kites in open fields
32. 32.True or false: “a single current path” is true of a series circuit. (a) True (b) False
33. 33.True or false: a plastic ruler is an insulator. (a) False (b) True
34. 34.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
35. 35.True or false: to fly a kite near wires is not safe. (a) True (b) False
36. 36.⚡ What does a night lamp mainly change electricity into? (a) movement (b) sound (c) light (d) heat
37. 37.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a series circuit (c) a closed circuit (d) a full circuit
39. 39.True or false: a tilt switch stays where you flip it. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) build with an adult near (b) take cells out after use (c) stay away from pylons (d) climb an electric pole

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