Login/Sign Up
Home » Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separate by energy band gap respectively equal to and Which of the following statements is true?(a) (b) (c) (d)
Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separate by energy band gap respectively equal to \left(E_{g}\right)_{S i},\left(E_{g}\right)_{c} and \left(E_{g}\right)_{G e} . Which of the following statements is true?
(a) \left(E_{g}\right)_{S i}<\left(E_{g}\right)_{G e}<\left(E_{g}\right)_{C}
(b) \left(E_{g}\right)_{C}<\left(E_{g}\right)_{G e}>\left(E_{g}\right)_{S i}
(c) \left(E_{g}\right)_{C}>\left(E_{g}\right)_{S i}>\left(E_{g}\right)_{G e}
(d) \left(E_{g}\right)_{C}=\left(E_{g}\right)_{S i}=\left(E_{g}\right)_{G e}
CBSE | Class 12 | NCERT | Physics | Semiconductor Electronics: Materials, Devices and Simple Circuits
Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separate by energy band gap respectively equal to \left(E_{g}\right)_{S i},\left(E_{g}\right)_{c} and \left(E_{g}\right)_{G e} . Which of the following statements is true?
(a) \left(E_{g}\right)_{S i}<\left(E_{g}\right)_{G e}<\left(E_{g}\right)_{C}
(b) \left(E_{g}\right)_{C}<\left(E_{g}\right)_{G e}>\left(E_{g}\right)_{S i}
(c) \left(E_{g}\right)_{C}>\left(E_{g}\right)_{S i}>\left(E_{g}\right)_{G e}
(d) \left(E_{g}\right)_{C}=\left(E_{g}\right)_{S i}=\left(E_{g}\right)_{G e}

(c) is the correct option.

Carbon has the largest energy bandgap among carbon, germanium, and silicon, while germanium has the smallest.

The energy band gap can be related as:

{{({{E}_{g}})}_{C}}>{{({{E}_{g}})}_{Si}}>{{({{E}_{g}})}_{Ge}}

i

More Material