Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 36 · 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.🔍 Which is the odd one out? (a) fly kites in open fields (b) keep drinks far away (c) use mains for a project (d) dry your hands first
2. 2.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
3. 3.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a series circuit (d) a full circuit
4. 4.True or false: an exhaust fan mainly gives out heat. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a rubber eraser (b) a safety pin (c) a copper wire (d) a brass key
6. 6.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) electrons (d) water drops
7. 7.⚠️ 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
8. 8.Which of these is a conductor? (a) a plastic ruler (b) a metal paper clip (c) a woollen thread (d) a wooden stick
9. 9.True or false: to build with an adult near is not safe. (a) True (b) False
10. 10.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 230 V (c) 15 V (d) 0.5 V
11. 11.⚡ What does a toaster mainly change electricity into? (a) sound (b) heat (c) light (d) movement
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 of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) used in house wiring (d) one bulb out, all go out
14. 14.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
15. 15.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
16. 16.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
17. 17.🔍 Which is the odd one out? (a) keep drinks far away (b) fly kites in open fields (c) stop if a part gets hot (d) poke things in a socket
18. 18.True or false: a doorbell mainly makes sound. (a) True (b) False
19. 19.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) quick and clear for all (d) symbols are heavier
20. 20.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a safe circuit (c) an open circuit (d) a short circuit
21. 21.💡 3 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?
22. 22.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
23. 23.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) use mains for a project (d) fly kites in open fields
24. 24.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
26. 26.⚡ What does a rice cooker mainly change electricity into? (a) light (b) heat (c) sound (d) movement
27. 27.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.Which of these gives us electricity? (a) an air conditioner (b) a bicycle dynamo (c) a television (d) a refrigerator
29. 29.⚡ What does an electric drill mainly change electricity into? (a) sound (b) movement (c) light (d) heat
30. 30.🔋 5 identical 2 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.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
32. 32.Which of these is safe? (a) open a phone charger (b) poke things in a socket (c) climb an electric pole (d) stay away from pylons
33. 33.True or false: to use mains for a project is safe. (a) False (b) True
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.Which of these uses electricity? (a) a solar panel (b) a wind turbine (c) a mobile phone (d) a generator
36. 36.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
37. 37.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) bulb (b) diode (c) switch (d) junction
38. 38.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is an insulator (c) to make them heavy (d) plastic is a conductor
39. 39.Which of these is an insulator? (a) an iron nail (b) a safety pin (c) a steel coin (d) a wooden stick
40. 40.🔋 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)? =

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