CUET · PHYSICS · PYQ PAPER 2023
A convex lens \(\left(n_g=1.5\right)\) of focal length 10 cm in air when immersed in a liquid behaves as a diverging lens of focal length 45 cm . The refractive index of the liquid :
- A 1.25
- B 2
- C 1.33
- D 1.68
Answer & Solution
Correct Answer
(D) 1.68
Step-by-step Solution
Detailed explanation
\(\frac{1}{f_a} = \left(n_g - 1\right)\left(\frac{1}{R_1} - \frac{1}{R_2}\right)\) \(\frac{1}{10} = (1.5 - 1)\left(\frac{1}{R_1} - \frac{1}{R_2}\right) \Rightarrow \left(\frac{1}{R_1} - \frac{1}{R_2}\right) = \frac{1}{5}\)…
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
- An electric motor operating at a 100 V D.C. supply draws a current of 12 A. If the efficiency of the motor is 30%, calculate the resistance of its winding.CUET 2023 Medium
- The colour of the third band of a colour coded carbon resistor of resistance \(2.3 \times 10^2 \Omega\) would beCUET 2023 Easy
- The given figure shows two magnetized needles and a magnet P with their magnetic moments, shown with the arrow sign. Which of the following statements are correct in respect of this configuration?
(A) \(Q_1\) is in stable equilibrium
(B) \(Q_2\) is in unstable equilibrium
(C) \(Q_1\) is in unstable equilibrium
(D) \(Q_2\) is in stable equilibrium
Choose the correct answer from the options given below:CUET 2025 Easy - A deutron and an \(\alpha\)-particle moving with the same velocity enter into a uniform magnetic field acting normal to the plane of their motion. The ratio of the circular paths described by the deutron and \(\alpha\)-particle isCUET 2023 Hard
- A sinusoidal voltage with peak value 220 V and variable frequency is applied to a series LCR circuit in which \( R = 10 \, \Omega \), \( L = 4 \, \text{mH} \), and \( C = 100 \, \text{mF} \). Consider the following:
(A) Resonant angular frequency \(\left(w_o\right)=50 rad / s\)
(B) Resonant frequency \(\left(v_o\right)=25 / n Hz\)
(C) Resonant frequency \(\left(v_o\right)=50 / n Hz\)
(D) The rms current at resonance is 15.5 A
Choose the correct answer from the options given below:CUET 2025 Hard - Match List-I with List-II
List - I (Observation) List - II (Light related phenomenon) (A) Blue colour of sky (I) Dispersion (B) Seven colours obtained from prism (II) Refraction (C) Bending of pencil dipped in water (III) Scattering (D) Alternate bright and dark bands of equal thickness (IV) Interference
Choose the correct answer from the options given below:CUET 2025 Medium
More PYQs from CUET
- In a game, a man wins ₹ \( 8\) for getting a number greater than 3 and loses ₹ 3 otherwise, when a fair die is thrown.
The man decided to throw a die 4 times but to quit as and when he gets a number greater than 3.
If \(X\) denotes the amount which the man wins or loses, then which of the following are correct?
(A) All the possible values of \(X\) are \(8,5,2\) and -1 .
(B) The probability distribution of \(X\) is :X 8 5 2 -1 -12 P(X) 1/2 1/4 1/8 1/16 1/16
(C) The mean value of \(X\) is \(\frac{75}{16}\).
(D) The variance of \(X\) is \(\frac{6615}{256}\).
Choose the correct answer from the options given below :CUET 2025 Medium - Match List I with List - II
Choose the correct answer from the options given below :List - I List - II (A) Aneuploidy (I) AB blood group (B) Co-dominance (II) Sex linked recessive disorder (C) Pleiotropy (III) Down's Syndrome (D) Colourblindness (IV) Phenylketonuria CUET 2023 Hard - Match List - I with List - II.
Choose the correct answer from the options given below:List - I List - II (A) Leydig cells (I) Release of sperm from seminiferous tubules (B) Sertoli cells (II) Transformation of spermatids to spermatozoa. (C) Spermiogenesis (III) Nutrition to growing sperms (D) Spermiation (IV) Androgens CUET 2023 Medium - Which of the following is the correct equation for the law of radioactive decay?
(Symbols have their usual meaning.)CUET 2023 Easy - Select the factor that does not disturb the genetic equilibrium :CUET 2023 Easy
- Amniocentesis is used in the prenatal diagnosis of:CUET 2023 Easy