CBSE Class 12 Semiconductor Electronics — practice questions
36 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Semiconductor Electronics in the app →An intrinsic semiconductor at room temperature has:Doping silicon with a pentavalent element like phosphorus creates a semiconductor in which:A p-n junction diode is forward biased when:The output of an AND gate is HIGH only when:On the basis of the energy-band picture, materials are classified by the size of the energy gap $E_g$ between At absolute zero ($T = 0\,\text{K}$), a pure intrinsic semiconductor behaves like a(n)In a pure intrinsic semiconductor at temperature $T > 0\,\text{K}$, the relation between the number density ofPure silicon is doped with a small amount of PHOSPHORUS (a pentavalent element from group 15). The resulting sIf silicon is doped with a TRIVALENT impurity such as boron (or indium), the resulting semiconductor isWhen a p-n junction is formed (BEFORE any external bias is applied), a thin region near the junction develops When a p-n junction diode is subjected to a FORWARD BIAS (p-side connected to the positive terminal of the batUnder REVERSE BIAS, an IDEAL p-n junction diode would carry zero current. A real diode, however, carries a verAn intrinsic silicon sample at room temperature has $n_i \approx 1.5\times 10^{16}\,\text{m}^{-3}$. After dopiThe barrier (built-in) potential of an unbiased silicon p-n junction at room temperature is approximatelyA semiconductor diode is connected with its p side at $+5\,\text{V}$ and its n side at $+3\,\text{V}$. Which bA p-n junction in REVERSE BIAS is irradiated with light of photon energy slightly GREATER than the band gap ofThe band holding the valence electrons is called the:The band just above the valence band is the:The energy separation between the two bands is called the:Deliberate addition of an impurity to a semiconductor is called:A doped semiconductor is described as:In an intrinsic semiconductor, electrons and holes are:Doping with a pentavalent atom gives which type?Doping with a trivalent atom gives which type?A pentavalent impurity is known as a:A trivalent impurity is known as an:In an n-type semiconductor, the majority carriers are:In a p-type semiconductor, the majority carriers are:One acceptor atom gives how many holes?Conductivity of an intrinsic semiconductor depends on its:A material with a band gap above three electron volts is an:A material with a band gap below three electron volts is a:A material behaves as a metal when the two bands:In an n-type semiconductor, the minority carriers are:A junction diode is described as a device with how many electrodes?Holes exist as vacant levels created in the: