Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 69 · 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.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
2. 2.Which of these is a conductor? (a) a plastic ruler (b) a wooden stick (c) a paper strip (d) a copper wire
3. 3.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber eraser (c) a paper strip (d) a steel spoon
5. 5.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
6. 6.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
7. 7.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
8. 8.🔦 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 a dry cork. Does the bulb glow? (a) Yes (b) No
9. 9.Which of these is not safe? (a) keep drinks far away (b) take cells out after use (c) poke things in a socket (d) fly kites in open fields
10. 10.⚡ What does an LED lamp mainly change electricity into? (a) sound (b) movement (c) heat (d) light
11. 11.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) the same voltage (d) a bigger voltage
12. 12.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
13. 13.Which of these is true of a parallel circuit? (a) many paths for current (b) bulbs share the voltage (c) a break stops every bulb (d) a single current path
14. 14.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
15. 15.🔋 How many 2 V cells must be joined in series to give 6 V?
16. 16.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
17. 17.Which of these is an insulator? (a) a copper wire (b) a brass key (c) a wooden stick (d) an iron nail
18. 18.Which of these mainly makes movement? (a) an electric toy car (b) a room heater (c) a water heater (d) a traffic signal
19. 19.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
20. 20.💡 5 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?
21. 21.🔦 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 wooden stick. Does the bulb glow? (a) Yes (b) No
22. 22.🔍 Which is the odd one out? (a) touch a fallen wire (b) build with an adult near (c) stay away from pylons (d) take cells out after use
23. 23.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
24. 24.Which of these is an insulator? (a) aluminium foil (b) an iron nail (c) a ceramic cup (d) a brass key
25. 25.Which of these is safe? (a) touch a switch when wet (b) use mains for a project (c) use a cable with cuts (d) use small battery cells
26. 26.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
27. 27.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a push button (c) a tilt switch (d) a reed switch
28. 28.Which of these is safe? (a) touch a fallen wire (b) poke things in a socket (c) touch a switch when wet (d) stop if a part gets hot
29. 29.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) double the voltage (d) half the voltage
30. 30.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a reed switch (c) a tilt switch (d) a slide switch
31. 31.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) motor (b) junction (c) bulb (d) resistor
32. 32.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
33. 33.🔁 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
34. 34.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is OFF (c) a cell is taken out (d) all wires are joined
35. 35.What does a reed switch do? (a) stays where you flip it (b) closes when tipped over (c) works only while pressed (d) closes near a magnet
36. 36.🔍 Which is the odd one out? (a) a graphite rod (b) a safety pin (c) aluminium foil (d) a wooden stick
37. 37.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
38. 38.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
39. 39.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) a series circuit (d) an open circuit
40. 40.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) bury them in soil (d) give them for recycling

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