TS EAMCET · Physics · Semiconductors
The change in current through a junction diode is \(12 \mathrm{~mA}\) when the forward bias voltage is changed by \(0.6 \mathrm{~V}\). The dynamic resistance is
- A \(500 \Omega\)
- B \(300 \Omega\)
- C \(150 \Omega\)
- D \(250 \Omega\)
Answer & Solution
Correct Answer
(A) \(500 \Omega\)
Step-by-step Solution
Detailed explanation
Change in current through junction diode, \[ \Delta=1.2 \mathrm{~mA}=1.2 \times 10^{-3} \mathrm{~A} \] Change in forward bias voltage, \(\Delta V=0.6 \mathrm{~V}\) Dynamic resistance, \[ R_{\text {dyn. }}=\frac{\Delta V}{\Delta l}=\frac{0.6}{1.2 \times 10^{-3}}=500 \Omega \]
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
- The moment of inertia of a thin circular disc about an axis passing through its centre and perpendicular to its plane is \(I\). Then, the moment of inertia of the disc about an axis parallel to its diameter and touching the edge of the rim isTS EAMCET 2008 Medium
- At a certain place a magnet makes 30 oscillations per minute. At another place where the magnetic field is double, its time period will beTS EAMCET 2012 Hard
- A sound wave of frequency 210 Hz travels with a speed of \(330 \mathrm{~ms}^{-1}\) along the positive x-axis. Each particle of the wave moves a distance of 10 cm between the two extreme points. The equation of the displacement function (s) of this wave is ( \(x\) in metre, \(t\) in second)TS EAMCET 2025 Medium
- All gases deviate from gas laws atTS EAMCET 2020 Easy
- Infinite number of spheres, each of mass \(m\) are placed on the \(X\)-axis at distances \(1,2,4,8\), 16 ...... metres from origin. The magnitude of the gravitational field at the origin isTS EAMCET 2015 Easy
- A given mass of a gas is compressed isothermally until its pressure is doubled. It is then allowed to expand adiabatically until its original volume is restored and its pressure is then found to be 0.75 of its initial pressure. The ratio of the specific heats of the gas is approximately :TS EAMCET 2006 Easy
More PYQs from TS EAMCET
- In a transistor circuit, when the base current is increased by 50 micro-amperes keeping the collector voltage fixed at 2 volts, the collector current increases by \(1 \mathrm{~mA}\). The current gain of the transistor isTS EAMCET 2002 Easy
- Match the following columns.
Codes \(\begin{array}{llll}A & B & C & D\end{array}\)TS EAMCET 2021 Easy - Half-life of a radioactive substance A is two times the half-life of another radioactive substance \(B\). Initially the number of nuclei of \(A\) and \(B\) are \(N_A\) and \(N_B\) respectively. After three half-lives of \(A\), the number of nuclei of both are equal. Then \(\frac{\mathrm{N}_{\mathrm{A}}}{\mathrm{N}_{\mathrm{B}}}\) isTS EAMCET 2023 Medium
- A physical quantity \(X\) is given by \(X=\frac{2 k^3 l^2}{m \sqrt{n}}\). The percentage errors in the measurements of \(k, l, m\) and \(n\) are \(1 \%, 2 \%, 3 \%\) and \(4 \%\) respectively. The value of \(X\) is uncertain byTS EAMCET 2023 Easy
- Heavy water is used as moderator in nuclear reactor becauseTS EAMCET 2023 Easy
- Consider a metal ball of radius \(r\) moving at a constant velocity \(v\) in a wiform magnetic field of induction \(\bar{B}\). Assuming that the direction of velocity forms an angle \(\alpha\) with the direction of \(\bar{B}\), the maximum potential difference between points on the ball isTS EAMCET 2017 Hard