What is the forbidden energy gap( ${"mathml":"<math class="image_resized" style="width:18px;height:19px"><span style="font-family:$ ) or band gap?

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Forbidden energy gap ${"mathml":"<math class="image_resized" style="width:18px;height:19px"><span style="font-family:$ is the difference of energy levels of conduction band and within conduction band

Forbidden energy gap ${"mathml":"<math class="image_resized" style="width:18px;height:19px"><span style="font-family:$ is the difference of energy levels of conduction band and valence band.

When there is no energy

Conduction band

answer is B.

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Detailed Solution

Concept: The prohibited gap is the space between the valence band and the conduction band. The forbidden gap, as the name implies, has no energy and no electrons remain in this band. If the forbidden energy gap is larger, the electrons in the valence band are strongly bound or firmly connected to the nucleus.
The forbidden energy gap, also known as the band gap, is the energy differential (eV) between the top of the valence band and the bottom of the conduction band in materials. Current flows through the materials due to electron transport from the valence band to the conduction band.
Hence, the correct option is 2.

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