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What is the correct symbol to represent the units of electric current?

The correct symbol to represent the units of electric current is "I", which is measured in amperes (A).


Why do the load extension graph passes through the origin?

The load extension graph passes through the origin because at the beginning of the test, there is no load applied, so the extension is zero. This is the starting point on the graph where load and extension are proportional to each other before any deformation occurs.


What are some common challenges students face when solving electric flux problems?

Some common challenges students face when solving electric flux problems include understanding the concept of electric flux, applying the correct formula or equation, interpreting the given information correctly, and dealing with complex geometries or varying electric fields.


Does electric bell not exhibit incandescence?

Correct, an electric bell does not exhibit incandescence. Incandescence is the emission of light due to high temperature, typically seen in incandescent light bulbs. Electric bells operate using an electromagnet to produce sound, not light.


When According to the laws of thermodynamics energy is never really created nor is ever really destroyed but instead transferred between entities?

Yes, that's correct. The first law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted from one form to another. This principle underlies many processes in nature and helps us understand how energy moves within systems.