CUET · PHYSICS · PYQ PAPER 2025
A given p-n junction is forward biased. Which of the following statements is correct?
- A The electrons move from p-region to n-region.
- B The height of potential barrier is increased.
- C The height of potential barrier is decreased.
- D The width of depletion region increases.
Answer & Solution
Correct Answer
(C) The height of potential barrier is decreased.
Step-by-step Solution
Detailed explanation
The height of potential barrier is decreased. This is correct. In forward bias, the applied voltage opposes the built-in potential of the junction, effectively reducing the height of the potential barrier and allowing current to flow.
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
- When a charged particle moves in a uniform magnetic field, its kinetic energy:CUET 2025 Medium
- The loss of strength of a signal while propagating through a medium is called-CUET 2023 Easy
- Identify the correct statements among the following.
(A) Inside a conductor, electrostatic field is non-zero
(B) Electrostatic potential is constant throughout the volume of the conductor and has the same value (as inside) on its surface
(C) In a conductor with a cavity, with no charges inside the cavity, the electric field inside the cavity is non-zero, whatever be the size and shape of the cavity
(D) At the surface of a charged conductor, electrostatic field must be normal to the surface at every point.
Choose correct answer from the options given below:CUET 2025 Easy - Which are the correct statements from given below:
A. Kirchhoff's junction rule is based on conservation of charge
B. Current is a vector quantity.
C. Current density is a vector quantity.
D. Resistance doesn't depend on dimension of conductor.
E. Resistivity depends on temperature.CUET 2023 Easy - Rohit has been given two converging lenses of focal lengths 1.25 cm and 5 cm, respectively to design a compound microscope. If it is desired to have a magnification of 30, what would be the separation between the objective and the eyepiece when the final image is formed at the least distance of distinct vision?CUET 2025 Hard
- Which of the following statements are correct?
A. In a region of free space with electric field E, there is an energy density \( \frac{1}{2}\epsilon_0 E^2 \)
B. An electromagnetic wave contains both electric and magnetic field.
C. Electromagnetic waves do not exert pressure
D. Hertz could not establish the wave nature of radiation.
E. No material medium is required for vibrations of electric field and magnetic field.CUET 2023 Easy
More PYQs from CUET
- The maximum slope of the curve \(y=-x^3+3 x^2+9 x-27\) is:CUET 2023 Hard
- An electrical circuit contains a battery of V = 4 V, and a resistance of R = 2 \( \Omega \). A galvanometer of resistance G = 40 \( \Omega \) shunted by S = 10 \( \Omega \) is used to measure current in the circuit. The reading of ammeter isCUET 2025 Medium
- The fruit which develops without fertilisation is called :CUET 2023 Easy
- An ideal battery of 6 V and resistance R are connected in series in the primary circuit of a potentiometer of length 4 m and resistance \( 10 \Omega \). The value of R, to give a potential difference of 10 mV across 20 cm of potentiometer wire is:CUET 2023 Easy
- Match the biological entity given in List-I with the metal involved in it given in List-II
List-I (Biological entity) List-II (Metal involved) (A) Chlorophyll (I) Iron (B) Haemoglobin (II) Magnesium (C) Vitamin B12 (III) Nickel (D) Urease (IV) Cobalt
Choose the correct answer from the options given below:CUET 2025 Medium - The differentiation of \(\frac{x^3}{1-x^3}\) w.r.t. \(x^3\) is:CUET 2023 Hard