Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 755 · 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.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
2. 2.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) a small battery pack (d) an inverter socket
3. 3.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
4. 4.Which of these mainly gives out heat? (a) a mixer grinder (b) an electric kettle (c) an exhaust fan (d) an electric toy car
5. 5.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) No (b) Yes
6. 6.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic is an insulator (c) to make them heavy (d) plastic makes current
7. 7.True or false: to keep drinks far away is safe. (a) False (b) True
8. 8.💡 2 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
9. 9.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
10. 10.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
11. 11.Which of these mainly gives out light? (a) an electric kettle (b) a siren (c) a tube light (d) an exhaust fan
12. 12.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
13. 13.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
14. 14.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) a bigger voltage (d) the same voltage
15. 15.True or false: aluminium foil is a conductor. (a) True (b) False
16. 16.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
17. 17.True or false: a rice cooker mainly gives out light. (a) True (b) False
18. 18.💡 5 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. How many bulbs glow?
19. 19.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
20. 20.True or false: a safety pin is a conductor. (a) False (b) True
21. 21.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
22. 22.Which of these gives us electricity? (a) a refrigerator (b) a water pump (c) a mobile phone (d) a bicycle dynamo
23. 23.True or false: a brass key is an insulator. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) climb an electric pole (b) fly a kite near wires (c) touch a switch when wet (d) stop if a part gets hot
25. 25.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.🔍 Which is the odd one out? (a) climb an electric pole (b) dry your hands first (c) keep drinks far away (d) fly kites in open fields
27. 27.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) movement (c) light (d) sound
28. 28.🔍 Which is the odd one out? (a) stop if a part gets hot (b) stay away from pylons (c) build with an adult near (d) open a phone charger
29. 29.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is OFF (c) the loop is complete (d) a wire has come loose
30. 30.⚡ What does an electric drill mainly change electricity into? (a) sound (b) heat (c) movement (d) light
31. 31.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
32. 32.🔍 Which is the odd one out? (a) use mains for a project (b) stay away from pylons (c) dry your hands first (d) fly kites in open fields
33. 33.True or false: a push button works only while pressed. (a) False (b) True
34. 34.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
35. 35.Which of these mainly gives out light? (a) a night lamp (b) a rice cooker (c) a doorbell (d) a siren
36. 36.🔍 Which is the odd one out? (a) throw cells in a fire (b) take cells out after use (c) fly kites in open fields (d) stop if a part gets hot
37. 37.True or false: a rubber band is an insulator. (a) False (b) True
38. 38.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it is just untidy (c) it spoils the paint (d) water makes it cold
39. 39.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a push button
40. 40.True or false: to throw cells in a fire is not safe. (a) True (b) False

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