Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 941 · 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 open a phone charger? (a) safe (b) not safe
2. 2.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) electric current (c) friction (d) sound
3. 3.Which of these is not safe? (a) stay away from pylons (b) climb an electric pole (c) keep drinks far away (d) build with an adult near
4. 4.True or false: a steel spoon is a conductor. (a) False (b) True
5. 5.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
6. 6.🔍 Which is the odd one out? (a) fly a kite near wires (b) fly kites in open fields (c) poke things in a socket (d) touch a switch when wet
7. 7.What does a reed switch do? (a) stays where you flip it (b) closes near a magnet (c) works only while pressed (d) springs back when let go
8. 8.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) wind energy (d) light energy
9. 9.Which of these is not safe? (a) take cells out after use (b) keep drinks far away (c) fly kites in open fields (d) use mains for a project
10. 10.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) motor (b) resistor (c) cell (d) LED
12. 12.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) both of them (d) none
13. 13.Which of these is a conductor? (a) a safety pin (b) a rubber eraser (c) a wooden stick (d) a rubber band
14. 14.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
15. 15.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) resistor (b) switch (c) voltmeter (d) battery
16. 16.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.Which of these is an insulator? (a) a graphite rod (b) aluminium foil (c) a steel coin (d) a plastic ruler
18. 18.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a cell (c) an insulator (d) a switch that is ON
19. 19.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
20. 20.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
21. 21.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
22. 22.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
23. 23.Which of these gives us electricity? (a) a wind turbine (b) an air conditioner (c) a computer (d) a refrigerator
24. 24.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
26. 26.True or false: to touch a fallen wire is not safe. (a) False (b) True
27. 27.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
28. 28.🔍 Which is the odd one out? (a) a steel coin (b) a metal paper clip (c) a steel spoon (d) a rubber eraser
29. 29.What does a toggle switch do? (a) works only while pressed (b) closes near a magnet (c) closes when tipped over (d) stays where you flip it
30. 30.Which of these is not safe? (a) build with an adult near (b) poke things in a socket (c) fly kites in open fields (d) keep drinks far away
31. 31.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) battery (b) junction (c) diode (d) LED
32. 32.Which of these is not safe? (a) stop if a part gets hot (b) dry your hands first (c) fly kites in open fields (d) use a cable with cuts
33. 33.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
34. 34.Which of these means the circuit is open? (a) a cell is taken out (b) the loop is complete (c) the switch is ON (d) all wires are joined
35. 35.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
37. 37.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) switch (c) capacitor (d) wire
38. 38.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
39. 39.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
40. 40.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False

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