AP EAMCET · PHYSICS · Ray Optics
An object is placed at a distance of 18 cm in front of a mirror. If the image is formed at a distance of 4 cm on the other side, then focal length, nature of the mirror and nature of image are respectively
- A 3.14 cm , concave mirror and real image
- B 3.14 cm , convex mirror and real image
- C 5.14 cm , convex mirror and virtual image
- D 5.14 cm , concave mirror and virtual image
Answer & Solution
Correct Answer
(C) 5.14 cm , convex mirror and virtual image
Step-by-step Solution
Detailed explanation
For a spherical mirror, \(\mathrm{u}=-18 \mathrm{~cm}, \mathrm{v}=4 \mathrm{~cm}\) \(\therefore\) By mirror formula, \(\frac{1}{f}=\frac{1}{v}+\frac{1}{u}=\frac{1}{4}+\frac{1}{-18} \Rightarrow f=\frac{36}{7} \mathrm{~cm}=5.14 \mathrm{~cm}\) Also, \(\mathrm{f}=+\mathrm{ve}\). So,…
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
- Photoelectrons are emitted with maximum velocity \(\mathrm{v}\) when light of frequency \(3 \mathrm{f}\) incidents on a photosensitive material of work function \(2 \mathrm{hf}\). If the frequency of the incident light is \(4.25 \mathrm{f}\), the maximum velocity of the emitted photoelectrons is
(h-Plank's constant)AP EAMCET 2023 Medium - A small electric heater is used to heat \(200 \mathrm{~g}\) of water. The time required to bring all this water from \(40^{\circ} \mathrm{C}\) to \(100^{\circ} \mathrm{C}\) is \(200 \mathrm{~s}\). If specific heat of the water is \(4200 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}\) then the power supplied by the heater isAP EAMCET 2022 Easy
- Light enters from air into a given medium at an angle of \(45^{\circ}\) with interface of the air-medium surface. After refraction, the light ray is deviated through an angle of \(15^{\circ}\) from its original direction. The refractive index of the medium isAP EAMCET 2023 Easy
- A sound wave passing through an ideal gas at NTP produces a pressure change of 0.001 dyne \(/ \mathrm{cm}^2\) during adiabatic compression. The corresponding change in temperature \((\gamma=1.5\) for the gas and atmospheric pressure is \(1.013 \times 10^6\) dyne \(/ \mathrm{cm}^2\) ) isAP EAMCET 2012 Hard
- Assertion (A): The upper surface of the wing of an aeroplane is made convex and the lower surface is made concave.
Reason (R): The air currents at the top have smaller velocity and thus less pressure at the bottom than at the top.AP EAMCET 2021 Medium - Two towns \(A\) and \(B\) are connected by a regular bus service with a bus leaving in either direction every \(T\) min. A man cycling with a speed of \(20 \mathrm{~km} / \mathrm{h}\) from \(A\) to \(B\) notices that a bus travelling in the direction of his motion goes past him every \(18 \mathrm{~min}\) and every \(6 \mathrm{~min}\) he notices a bus travelling in the opposite direction go past him. Assuming that, the buses travel with a constant speed. Find \(T\) and the constant speed of the buses.AP EAMCET 2021 Medium
More PYQs from AP EAMCET
- Match the following.
AP EAMCET 2021 Hard - \(\int \frac{f(x) g^{\prime}(x)-f^{\prime}(x) g(x)}{f(x) g(x)} \times[\log g(x)-\log f(x)] d x\) is equal toAP EAMCET 2015 Hard
- The slopes of the lines represented by \(x^2+2 h x y+2 y^2=0\) are in the ratio \((1: 2)\), then \(h\) is equalAP EAMCET 2021 Medium
- The area (in sq. units) of the region bounded by the curves \(y=x \log x\) and \(y=2 x-2 x^2\) isAP EAMCET 2018 Easy
- The equation of the circle whose diameter is the common chord of the circles \(x^2+y^2+2 x+3 y+1=0\) and \(x^2+y^2+4 x+3 y+2=0\) isAP EAMCET 2019 Medium
- Four cards are drawn at random from a pack of playing cards. The probability of getting exactly two cards from the same suit and the remaining two cards from two different suits isAP EAMCET 2018 Easy