CUET · PHYSICS · PYQ PAPER 2025
The reverse biasing in a p-n junction diode
- A decreases the potential barrier height
- B increases the potential barrier height
- C decreases the number of minority charge carriers
- D increases the number of majority charge carriers
Answer & Solution
Correct Answer
(A) decreases the potential barrier height
Step-by-step Solution
Detailed explanation
In a reverse-biased p-n junction, the positive terminal of the battery is connected to the n-side and the negative terminal to the p-side. This pulls majority carriers (holes and electrons) away from the junction, which widens the depletion layer and increases the potential…
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
- Two point charges placed a distance d apart in vacuum exert a force of magnitude F on each other. One of the two charges is doubled. To keep the magnitude of force same the separation between the charges should be changed toCUET 2025 Hard
- A semiconductor device is connected in series circuit with a battery and resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops at almost zero. The device may beCUET 2023 Medium
- The smallest wavelength in the spectral lines of Paschen series in the hydrogen atom is (Given: \( R = 1.097 \times 10^{7} \text{ m}^{-1} \))CUET 2025 Medium
- A 600 pF capacitor is charged by a 150 V battery. The charge on the capacitor is:CUET 2025 Hard
- The primary voltage and primary current of a transformer are 220 V and 10 A. The ratio of the number of turns on the secondary coil to the number of turns on the primary coil is 2:1. The values of voltage and current at the output areCUET 2025 Easy
- Carbon, silicon and germanium have four valence electrons each. Their valence and conduction bands are separated by energy gap \( E_g \). If we represent \( (E_g)_C, (E_g)_{Si} \) and \( (E_g)_{Ge} \) as their respective energy gaps, then which of the following is trueCUET 2025 Hard
More PYQs from CUET
- A thin infinite line charge has linear charge density of \( 2.0 \times 10^{-9} \text{ C/m} \). The electric field intensity at a distance of 3 m from the line charge is : (\( \frac{1}{4\pi\epsilon_0} = 9 \times 10^9 \))CUET 2023 Medium
- Exponential growth rate of a population is graphically represented by -CUET 2025 Hard
- The work functions of Cesium and Platinum are 1.9 eV and 5.7 eV, respectively. The ratio of their threshold wavelengths, respectively isCUET 2025 Easy
- Arrange the given steps involved in gel electrophoresis used for separation of DNA fragments?
(A) Exposure to UV light
(B) Staining with ethidium bromide
(C) Movement of DNA fragments towards anode
(D) Elution
Choose the correct answer from the options given below:CUET 2025 Medium - In flowering plants, zygote develops into :CUET 2023 Medium
- Since Physisorption arises mainly because of van der Waals forces, it means adsorption is:
(pick the incorrect option)CUET 2023 Hard