MHT CET · Physics · Semiconductors
For the diagram shown, the resistances between points \(\mathrm{A}\) and \(\mathrm{B}\) when ideal diode \(\mathrm{D}\) is forward biased is ' \(R_1\) ' and that when reverse biased is ' \(R_2\) '. The ratio \(R_1: R_2\) is
- A \(2: 1\)
- B \(1: 1\)
- C \(1: 2\)
- D \(1: 4\)
Answer & Solution
Correct Answer
(C) \(1: 2\)
Step-by-step Solution
Detailed explanation
When the diode is forward biased, current will flow through both the arms.
\(\therefore \quad\) The effective resistance is
\(\mathrm{R}_1=\frac{40 \times 40}{80}=\frac{1600}{80}=20 \Omega\)
When the diode is reverse biased, current will flow through the bottom arm only
\(\therefore \quad\) The effective resistance \(\mathrm{R}_2\) is \(40 \Omega\).
\(\therefore \quad \frac{\mathrm{R}_1}{\mathrm{R}_2}=\frac{20}{40}=\frac{1}{2}\)
\(\therefore \quad\) The effective resistance is
\(\mathrm{R}_1=\frac{40 \times 40}{80}=\frac{1600}{80}=20 \Omega\)
When the diode is reverse biased, current will flow through the bottom arm only
\(\therefore \quad\) The effective resistance \(\mathrm{R}_2\) is \(40 \Omega\).
\(\therefore \quad \frac{\mathrm{R}_1}{\mathrm{R}_2}=\frac{20}{40}=\frac{1}{2}\)
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 quantity which does not vary periodically for a particle performing S.H.M. isMHT CET 2019 Easy
- Which of the following graphs between pressure (P) and volume (V) correctly shows isochoric changes?
MHT CET 2023 Easy - The threshold frequency of a metal is ' \(F_0\) '. When light of frequency \(2 \mathrm{~F}_0\) is incident on the metal plate, the maximum velocity of photoelectron is ' \(\mathrm{V}_1\) ' When the frequency of incident radiation is increased to ' \(5 \mathrm{~F}_0\) ', the maximum velocity of photoelectrons emitted is ' \(\mathrm{V}_2\) '. The ratio of \(\mathrm{V}_1\) to \(\mathrm{V}_2\) isMHT CET 2024 Medium
- In energy band diagram of insulators, a band gap and the conduction band is respectivelyMHT CET 2020 Easy
- Two bar magnets \(A\) and \(B\) are geometrically similar but the magnetic moment of \(A\) is twice that of \(B\). \(T_1\) is the time period of oscillation when their like poles are kept together. When unlike poles are kept together, the time period of oscillation is \(\mathrm{T}_2\). The ratio \(\mathrm{T}_1: \mathrm{T}_2\) will beMHT CET 2025 Medium
- In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is a/an
MHT CET 2008 Easy
More PYQs from MHT CET
- A charge \(+Q\) is placed at each of the diagonally opposite corners of a square. A charge -q is placed at each of the other diagonally opposite corners as shown. If the net electrical force on \(+Q\) is zero, then \(\frac{+Q}{-q}\) is equal to
MHT CET 2024 Easy - The value of \(\sin ^{-1}\left(-\frac{1}{2}\right)+\cos ^{-1}\left(-\frac{\sqrt{3}}{2}\right)\) isMHT CET 2020 Easy
- The unknown resistances are connected in two gaps of a metre bridge. The null point is at \(20 \mathrm{~cm}\) from zero end. A resistance of \(15 \Omega\) is connected in series with the smaller of the two. The null point shifts to \(40 \mathrm{~cm}\). The smaller resistance isMHT CET 2020 Medium
- The unit vector perpendicular to the plane \(4 x-3 y+12 z=15\) isMHT CET 2020 Easy
- Identify the sugar molecule involved in polynucleotide formation.MHT CET 2022 Medium
- What is vapour pressure of a solution containing \(1 \mathrm{~mol}\) of a non-volatile solute in \(36 \mathrm{~g}\) of water?
\(
\left(\mathrm{P}_1^0=400 \mathrm{~mm} \mathrm{Hg}\right)
\)MHT CET 2021 Medium