Question

নিম্নলিখিত প্রশ্নগুলির উত্তর দাও :
18. দেখাও যে বলের ঘাত বস্তুর ভরবেগের পরিবর্তনের সমান।
2
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Answer 1

A large band gap means that a lot of energy is required to excite valence electrons to the conduction band. Conversely, when the valence band and conduction band overlap as they do in metals, electrons can readily jump between the two bands meaning the material is highly conductive.

Answer 2

Answer:

The magnetic effect of electric current is known as electromagnetic effect. It is observed that when a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity. This shows that electric current produces a magnetic effect.