Si and Cu are cooled to a temperature of $300 \mathrm{K}$, then conductivity,

Important Questions on Semiconductor Electronics: Materials, Devices and Simple Circuits

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 9

Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 10

The energy gap of a semiconductor is $1.10 \mathrm{eV}$ The maximum wavelength $(\mathrm{in} \stackrel{°}{\mathrm{A}})$ at which it starts energy absorption will be

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 11

The energy levels of holes are:
 

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 12

Carbon, silicon and germanium have four valence electrons each. These are characterized by valence and conduction bands separated by energy band gap respectively equal to ${\left({\mathrm{E}}_0\right)}_{\mathrm{C}}, {\left({\mathrm{E}}_0\right)}_{\mathrm{Si}}$ and ${\left({\mathrm{E}}_0\right)}_{\mathrm{Ge}}$. Which of the following statements is true?

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 13

The conductivity of a semiconductor increases with increase in temperature because

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 14

In semiconductor, at room temperature:

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 15

Which one of the following is not an elemental semiconductor?

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 16

In an intrinsic semiconductor, the forbidden energy gap between valence band and a conduction band is of the order of _____.