TS EAMCET · Physics · Electrostatics
Two lenses of power D and D respectively are placed in contact. The focal length of the combination is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Given, the power of the lens, P1=-1.6 D and P2=+2.1 D ∵ P=P1+P2=-1.6 D+2.1 D=0.5 D, now use the relation between focal length and power of the lens, ∴ P=1fm⇒P=100fcm⇒0.5=100f. Focal length of the combination,…
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 sensitivity of a galvanometer that measures current is decreased by \(\frac{1}{40}\) times by using shunt resistance of \(10 \Omega\). Then, the value of the resistance of the galvanometer isTS EAMCET 2013 Easy
- The position of an object moving along \(X\)-axis is given by \(x=\alpha+\beta t^2\), where \(\alpha\) and \(\beta\) are constants with appropriate dimensions and \(t\) is time in seconds. The average velocity between \(t=2 \mathrm{~s}\) and \(4 \mathrm{~s}\) is \(12 \mathrm{~m} / \mathrm{s}\). If \(\alpha=8 \mathrm{~m}\), then the value of \(\beta\) isTS EAMCET 2020 Easy
- A particle is projected from the ground with an initial speed of \(v\) at an angle of projection \(\theta\). The average velocity of the particle between its time of projection and time it reaches highest point of trajectory isTS EAMCET 2013 Medium
- A cyclist is riding with a speed of \(36 \mathrm{~km} / \mathrm{h}\). As he approaches a circular turn on the road of radius \(50 \mathrm{~m}\), he applies brakes and reduces his speed at the constant rate of \(0.5 \mathrm{~m} / \mathrm{s}\) every second. The magnitude and direction of the net acceleration of the cyclist on the circular turn respectively areTS EAMCET 2022 Hard
- A particle performs simple harmonic motion with a time period of \(16 \mathrm{~s}\). At a time \(t=2 \mathrm{~s}\), the particle passes through the origin and at \(\mathrm{t}=4 \mathrm{~s}\) its velocity is \(4 \mathrm{~m} / \mathrm{s}\). The amplitude of the motion isTS EAMCET 2022 Easy
- Regarding fundamental forces in nature, the correct statement isTS EAMCET 2024 Easy
More PYQs from TS EAMCET
- If \(\mathrm{F}_1\) and \(\mathrm{F}_2\) are the relative strengths of the gravitational and weak nuclear forces respectively, then \(\frac{F_2}{F_1}\) is nearlyTS EAMCET 2023 Easy
- A dielectric circular disc of radíus \(R\) carries a unform surface charge density \(\sigma\). If it rotates about its axis with angular velocity \(\omega\), the magnetic fíeld at the cente of dísc is :TS EAMCET 2019 Hard
- Consider the following two circuits bulbs are connected in series to a power supply line bulbs identical to are connected in a parallel circuit to an identical power supply line Identify which of the following is not trueTS EAMCET 2018 Easy
- A vehicle sounding a whistle of frequency \(256 \mathrm{~Hz}\) is moving on a straight road, towards a hill with a velocity of \(10 \mathrm{~ms}^{-1}\). The number of beats per second observed by a person travelling in the vehicle is velocity of sound \(=330 \mathrm{~ms}^{-1}\)TS EAMCET 2005 Medium
- The angle of contact is \(120^{\circ}\) when a cylindrical rod is vertically placed in a liquid. If the same rod is placed horizontally in the liquid, then the angle of contact isTS EAMCET 2023 Medium
- At a certain place a magnet makes 30 oscillations per minute. At another place where the magnetic field is double, its time period will beTS EAMCET 2012 Hard