Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 34 · 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 it safe to use small battery cells? (a) not safe (b) safe
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.True or false: to fly kites in open fields is not safe. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) a steel coin (b) an iron nail (c) a dry cork (d) a brass key
6. 6.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
7. 7.Which drawing is the symbol for a switch? (a) a circle with A inside (b) triangle, bar and arrows (c) a circle with M inside (d) a line lifted at a gap
8. 8.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a bulb (c) a long wire (d) a fuse or MCB
9. 9.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the filament (c) the switch (d) the base
10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
11. 11.Which of these gives us electricity? (a) a refrigerator (b) an air conditioner (c) a wind turbine (d) a television
12. 12.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a plastic gap (d) a complete loop
13. 13.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) bulbs share the voltage (d) used in house wiring
14. 14.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
15. 15.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
16. 16.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.Which of these uses electricity? (a) a wind turbine (b) a cell (c) a battery (d) a television
18. 18.Which of these is not safe? (a) keep drinks far away (b) touch a fallen wire (c) stop if a part gets hot (d) stay away from pylons
19. 19.Which of these is safe? (a) touch a fallen wire (b) open a phone charger (c) touch a switch when wet (d) dry your hands first
20. 20.Which of these mainly makes sound? (a) a buzzer (b) an electric kettle (c) an exhaust fan (d) a traffic signal
21. 21.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
22. 22.⚡ What does a buzzer mainly change electricity into? (a) light (b) heat (c) sound (d) movement
23. 23.What does a reed switch do? (a) slides side to side (b) closes near a magnet (c) works only while pressed (d) springs back when let go
24. 24.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) a rubber band (b) a ceramic cup (c) a rubber eraser (d) a steel spoon
26. 26.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) Yes (b) No
28. 28.🔦 A circuit has a new cell, a bulb with a broken filament 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) Yes (b) No
29. 29.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) nobody (c) a younger child (d) a stranger online
30. 30.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
31. 31.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
33. 33.Which drawing is the symbol for a wire? (a) a circle with a cross (b) a circle with V inside (c) one tall, one short bar (d) a straight line
34. 34.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) all wires are joined (d) the bulb is unscrewed
35. 35.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
36. 36.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
38. 38.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) an open circuit (d) a safe circuit
39. 39.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
40. 40.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =

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