Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 87 · 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.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) in parallel (d) by Wi-Fi
3. 3.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
4. 4.Which of these means the circuit is open? (a) all wires are joined (b) a wire is cut (c) the switch is ON (d) the loop is complete
5. 5.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) battery (b) capacitor (c) cell (d) switch
6. 6.🔍 Which is the odd one out? (a) use small battery cells (b) build with an adult near (c) stay away from pylons (d) use a cable with cuts
7. 7.🔍 Which is the odd one out? (a) a torch (b) a mixer grinder (c) a street light (d) a tube light
8. 8.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
9. 9.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) battery (b) resistor (c) diode (d) bulb
10. 10.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
11. 11.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) a closed circuit (d) an open circuit
12. 12.True or false: a reed switch closes near a magnet. (a) False (b) True
13. 13.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) sound (d) friction
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) dotted circles (d) wavy lines
15. 15.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
16. 16.⚡ What does a buzzer mainly change electricity into? (a) heat (b) light (c) movement (d) sound
17. 17.💡 5 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?
18. 18.True or false: a dry cork is a conductor. (a) True (b) False
19. 19.Which of these is a conductor? (a) a copper wire (b) a rubber eraser (c) a plastic ruler (d) a ceramic cup
20. 20.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
21. 21.🔦 A circuit has a used-up (dead) 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 plastic straw. Does the bulb glow? (a) Yes (b) No
22. 22.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a safe circuit (c) a parallel circuit (d) a short circuit
23. 23.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
24. 24.Which drawing is the symbol for a wire? (a) a straight line (b) triangle, bar and arrows (c) triangle against a bar (d) many long-short pairs
25. 25.True or false: a slide switch stays where you flip it. (a) True (b) False
26. 26.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
27. 27.⚡ What does a street light mainly change electricity into? (a) sound (b) light (c) movement (d) heat
28. 28.Which of these is an insulator? (a) an iron nail (b) a rubber eraser (c) a steel coin (d) a copper wire
29. 29.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
31. 31.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) the loop is complete (d) a wire is cut
32. 32.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
33. 33.True or false: a circle with V inside is the symbol for a voltmeter. (a) False (b) True
34. 34.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
35. 35.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
36. 36.🔦 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
37. 37.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
38. 38.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
39. 39.Which of these mainly gives out light? (a) a tube light (b) a room heater (c) a buzzer (d) a siren
40. 40.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) both of them (d) only one

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