MHT CET · Physics · Semiconductors
Which one of the following graph represents forward bias characteristic of a diode?
- A C
- B B
- C D
- D A
Answer & Solution
Correct Answer
(C) D
Step-by-step Solution
Detailed explanation
Conceptual problem. Theory based.
Graph D has exponential characteristic, which is similar to ideal diode.
The current-voltage function (also called the " \(i-v\) characteristic") for an ideal diode is
\(i(v)=I_S\left[\exp \left(\frac{v}{\eta V_T}\right)-1\right], v>V_Z\)
where \(I_S\) is the reverse saturation current, \(v\) is the applied voltage (reverse bias is negative), \(V_T\) is constant dependent on temperature, and \(\eta\) is the emission coefficient, which is 1 for germanium devices and 2 for silicon devices.
\(V_Z\) is the reverse bias break done voltage.
Graph D has exponential characteristic, which is similar to ideal diode.
The current-voltage function (also called the " \(i-v\) characteristic") for an ideal diode is
\(i(v)=I_S\left[\exp \left(\frac{v}{\eta V_T}\right)-1\right], v>V_Z\)
where \(I_S\) is the reverse saturation current, \(v\) is the applied voltage (reverse bias is negative), \(V_T\) is constant dependent on temperature, and \(\eta\) is the emission coefficient, which is 1 for germanium devices and 2 for silicon devices.
\(V_Z\) is the reverse bias break done voltage.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A point charge \(Q\) is placed at the center of the line joining two equal point charges \(+q\) and \(+q\). The value of \(Q\) if the system of the charges is equilibrium, isMHT CET 2021 Medium
- A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \mathrm{~m} / \mathrm{s}\). If both trains emit sounds of frequency 300 Hz , difference of frequencies heard by the person will be (speed of sound in air \(=330 \mathrm{~m} / \mathrm{s}\) )MHT CET 2025 Medium
- Earth is assumed to be a charged conducting sphere having volume V and surface area \(A\). The capacitance of the earth in free space is ( \(\epsilon_0=\) permittivity of free space)MHT CET 2025 Medium
- The length of a potentiometer wire is \(L\). A cell of e.m.f. \(E\) is balanced at a length \(\frac{L}{3}\) from the positive end of the wire. If the length of the wire is increased \(\frac{L}{2}\) at what distance will the same cell gives a balance point?MHT CET 2022 Medium
- To manufacture a solenoid of length ' \(\ell\) ' and inductance ' \(L\) ', the length of the thin wire required is (Diameter of the solenoid is very less than length, \(\mu_0=\) permeability of free space)MHT CET 2025 Medium
- A constant force acts on two different masses independently and produces accelerations \(A_1\) and \(A_2\). When the same force acts on their combined mass, the acceleration produced isMHT CET 2025 Easy
More PYQs from MHT CET
- Two spherical black bodies have radii ' \(R_1\) ' and ' \(R_2\) '. Their surface temperatures are \(T_1 K\) and \(T_2 K\) respectively. If they radiate the same power, the ratio \(\frac{\mathrm{R}_1}{\mathrm{R}_2}\) isMHT CET 2025 Easy
- Identify the correct statement:
Water flows between two cells__________.MHT CET 2020 Hard - The electron in hydrogen atom is moving in an orbit of radius \(0.53 Å\). It takes \(1.571 \times 10^{-16} \mathrm{~s}\) to complete one revolution. The velocity of electron will be \([\pi=3 \cdot 142]\)MHT CET 2020 Easy
- Let '\sigma' and 'b' be Stefan's constant and Wien's constant respectively, then
dimensions of ' \(\sigma \mathrm{b}\) ' areMHT CET 2020 Medium - The general solution of the differential equation \(\frac{\mathrm{dy}}{\mathrm{dx}}=\tan \left(\frac{\mathrm{y}}{\mathrm{x}}\right)+\frac{\mathrm{y}}{\mathrm{x}}\) isMHT CET 2021 Medium
- The most common chemical compounds formed in Urey-Miller's experiment wereMHT CET 2016 Medium