WBJEE · Physics · Ray Optics
A point object is placed on the axis of a thin convex lens of focal length \(0.05 \mathrm{m}\) at a distance of \(0.2 \mathrm{m}\) from the lens and its image is formed on the axis. If the object is now made to oscillate along the axis with a small amplitude of \(A \mathrm{cm},\) then what is the amplitude of oscillation of the image? \(\left[\right.\) you may assume, \(\frac{1}{1+x} \approx 1-x,\) where \(\left.x< < 1\right]\)
- A \(\frac{4 A}{9} \times 10^{-2} m\)
- B \(\frac{5 A}{9} \times 10^{-2} m\)
- C \(\frac{A}{3} \times 10^{-2} m\)
- D \(\frac{A}{9} \times 10^{-2} \mathrm{m}\)
Answer & Solution
Correct Answer
(D) \(\frac{A}{9} \times 10^{-2} \mathrm{m}\)
Step-by-step Solution
Detailed explanation
According to the question, we can draw the following diagram Given, \(u=-0.2 \mathrm{m}\) and \(f=0.05 \mathrm{m}\) As we know that,…
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
- Consider the integral form of the Gaussian law in electrostatics.
Which of the following statements are correct?WBJEE 2024 Medium - The minimum force required to start pushing a body up a rough (having co-efficient of friction \(\mu\) ) inclined plane is \(\vec{F}_1\) while the minimum force needed to prevent it from sliding is \(\vec{F}_2\). If the inclined plane makes an angle \(\theta\) with the horizontal such that \(\tan \theta=2 \mu\), then the ratio \(F_1 / F_2\) isWBJEE 2025 Medium
- A ray of monochromatic light is incident on the plane surface of separation between two media \(X\) and \(Y\) with angle of incidence 'i' in medium \(X\) and angle of refraction ' \(r\) ' in medium \(Y\). The given graph shows the relation between sin \(i\) and \(\sin r\). If \(V_x\) and \(V_{\mathrm{Y}}\) are the velocities of the ray in media \(X\) and \(Y\) respectively, then which of the following is true?
WBJEE 2023 Hard - A spherical ball \(A\) of mass 4 kg, moving along a straight line strikes another spherical ball \(B\) of mass \(1 \mathrm{kg}\) at rest. After the collision, \(A\) and \(B\) move with velocities \(y_{1} \mathrm{ms}^{-1}\) and \(v_{2} \mathrm{ms}^{-1}\) respectively making angles of \(30^{\circ}\) and \(60^{\circ}\) with
respect to the original direction of motion of \(A .\) The ratio \(\frac{y_{1}}{v_{2}}\) will beWBJEE 2012 Medium - The electric field of a plane electromagnetic wave of wave number \(k\) and angular frequency \(\omega\) is given by \(\vec{E}=E_0(\hat{i}+\hat{j}) \sin (k z-\omega t)\). Which of the following gives the direction of the associated magnetic field \(\vec{B}\) ?WBJEE 2023 Easy
-
A small bar magnet of dipole moment \(M\) is moving with speed \(v\) along \(x\) direction towards a small closed circular conducting loop of radius ' \(a\) ' with its centre \(O\) at \(x=0\) (see figure). Assume \(x>>a\) and the coil has a resistance \(R\). Then which of the following statemenmt(s) is/are true?WBJEE 2021 Medium
More PYQs from WBJEE
- Let A be the set of even natural numbers that are < 8 &
B be the set of prime integers that are < 7
The number of relations from A to B areWBJEE 2024 Easy -
For the above three esters, the order of rates of alkaline hydrolysis isWBJEE 2020 Medium - A point \(P\) lies on the circle \(x^{2}+y^{2}=169\). If \(Q=(5,12)\) and \(R=(-12,5),\) then the \(\angle Q P R\) isWBJEE 2013 Medium
- An ideal gas is compressed isothermally until its pressure is doubled and then allowed to expand adiabatically to regain its original volume \(\left(\gamma=1.4\right.\) and \(\left.2^{-14}=0.38\right)\). The ratio of the final to initial pressure isWBJEE 2011 Hard
- If \(4 a^2+9 b^2-c^2+12 a b=0\), then the family of straight lines \(a x+b y+c=0\) is concurrent atWBJEE 2023 Medium
- Let \(A\) be the centre of the circle \(x^{2}+y^{2}-2 x-4 y-20=0 .\) Let \(B(1,7)\) and
\(D(4,-2)\) be two points on the circle such that tangents at \(B\) and \(D\) meet at \(C\). The area of the quadrilateral \(A B C D\) isWBJEE 2018 Medium