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 In the equilibrium state, the barrier potential across a unbiased silicon diode is _________
  • a)
    0.3 V
  • b)
    0.7 V
  • c)
    1.3 V
  • d)
    0 V
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
In the equilibrium state, the barrier potential across a unbiased sili...
Barrier potential is due to the charges that establish an electric field across the two junctions.
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In the equilibrium state, the barrier potential across a unbiased sili...
Equilibrium state of a Silicon Diode

The equilibrium state of a silicon diode is the state where there is no external voltage applied to the diode, and the diode is not conducting current. In this state, the electrons and holes are in thermal equilibrium and are distributed evenly across the junction.

Barrier Potential

The barrier potential is the potential difference across the junction of a diode when no current is flowing through it. It is also known as the built-in potential.

The barrier potential across a silicon diode is approximately 0.7 V at room temperature. This potential is a result of the difference in the Fermi levels of the p-type and n-type regions of the diode. The p-type region has a higher Fermi level than the n-type region, resulting in the formation of a potential barrier when the two regions are brought into contact.

Answer

The correct answer is option B, 0.7 V, since this is the typical value of the barrier potential across a silicon diode at room temperature in the equilibrium state.
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