List of top Questions asked in TS EAMCET

The lengths of two copper wires A and B are 180 cm and 270 cm respectively. If the mass of wire A is twice the mass of wire B and the electrical resistance of wire A is \(200\Omega\), then the electrical resistance of wire B is:

A potentiometer wire of length \(10\) m and resistance \(9\,\Omega\) is connected to a cell of emf \(E\) and internal resistance \(1\,\Omega\). If \(V\) is the maximum potential difference that can be measured using the potentiometer, then the condition for the potentiometer to work is

A part of an electric circuit is shown in the figure. If the reading of the voltmeter is 100 V and the resistance of the voltmeter is 200 $\Omega$, then the value of the resistance $R_{2}$ is}

In an astronomical telescope of $135\text{ cm}$ length kept in normal adjustment, if the difference between the focal lengths of the objective and eyepiece is $125\text{ cm}$, then the magnification of the telescope is:}

If the potential difference across the ends of a copper wire of \(100\) cm length is \(2\) V and the conductivity of copper is \[ 5.95\times10^7\ \mathrm{Sm^{-1}}, \] then the current per unit area (in \(\mathrm{Am^{-2}}\)) of the conductor is

The spheres A, B and C have radii R, R and 2R respectively. Initially A has charge -Q, B is neutral and C has charge such that its surface charge density equals that of A. After contact and separation, charges are:

Ohm's law is valid when:

One end of a metal wire of length \(100\text{ cm}\) and radius \(0.6\text{ mm}\) is attached to an end of another wire made of the same metal of length \(180\text{ cm}\) and radius \(0.9\text{ mm}\). If the free end of the longer wire is kept at a potential of \(20\text{ V}\) and the free end of the shorter wire is kept at a potential of \(2\text{ V}\), then the potential at the junction of the two wires is:

A metal wire of length 120 cm and area of cross-section $1.8\times10^{-6}m^{2}$ is carrying a current of 2 A. If the number of free electrons per unit volume in the wire is $6.25\times10^{28}m^{-3}$, then the time taken by an electron to drift from one end to the other end of the wire (in hours) is}

When a cell is connected to either $2\,\Omega$ or $4.5\,\Omega$ resistors, if the power consumption is same in both the cases, then the internal resistance of the cell is:

In the given circuit, if the potential difference between the points A and B is 90 V and the resistance of the voltmeter is 6000 $\Omega$, then the reading of the voltmeter is

The ratio of the speeds of light in a prism P and in vacuum is \(1:\sqrt3\) and the angle of minimum deviation is \(60^\circ\). In another prism Q of same angle of prism, if the angle of minimum deviation is \(30^\circ\), then the refractive index of the material of prism Q is:

If the angles of minimum deviation when a prism of angle \(80^\circ\) is placed separately in air and in a liquid are \(40^\circ\) and \(10^\circ\) respectively, then the refractive index of the liquid is

A card divided into squares each of size \(1\ \mathrm{mm^2}\) is viewed through a magnifying glass of focal length \(10\) cm which is held close to the eye. The distance at which the lens is to be placed from the card to view the squares with maximum possible magnification is

A point object is at rest on the principal axis at a distance of 20 cm from a concave mirror of radius of curvature 30 cm. Under the action of a horizontal force, the object moves away from the mirror along the axis and reaches a distance of 40 cm from the mirror in a time of 3 s. The acceleration of the image is:

When a thin convex lens is immersed in a liquid of refractive index $1.2$, the focal length of the lens becomes $48\text{ cm}$. If the ratio of the radii of curvature of the lens is $2:3$ and the refractive index of the material of the lens is $1.5$, then the radii of curvature of the lens are:

If a convex lens of focal length \(22.5\text{ cm}\) is moved between an object and a screen placed \(120\text{ cm}\) apart, then the ratio of the minimum and maximum magnifications is:

In minimum deviation position of a prism made of refractive index \(\sqrt3\), the angle of deviation of the light ray is \(\frac{\pi}{6}\). If a light ray incidents normally on the first face of the prism, then the angle of incidence of the light ray on the second face of the prism is:

Focal lengths of objective = 20 m and eyepiece = 1 cm. Find angular magnification of telescope.

A thin convex lens forms a virtual image when an object is placed on the principal axis at a distance of 12 cm from the lens. When the object is moved away from the lens along the principal axis through a distance of 18 cm, the lens forms a real image. If the magnification of the virtual image is five times the magnification of the real image, then the focal length of the lens is

A Carnot engine operates between \(33^\circ C\) and \(133^\circ C\). During adiabatic expansion, relation is \(T\sqrt{V}=constant\). The work done by \(10\) moles during adiabatic expansion is

Angle of minimum deviation for a prism --- the ray inside the prism:

\(5\) moles of monoatomic gas and one mole of rigid diatomic gas are mixed. The internal energy at temperature \(127^\circ C\) is (Given \(R=8.31Jmol^{-1}K^{-1}\))

The angle of inclination of an inclined plane is \(45^\circ\). If the coefficient of kinetic friction between the inclined plane and a block on it is \(0.2\), then the block released from rest from the top of the inclined plane reaches the bottom of the plane in a time of \(3\) s. If the coefficient of kinetic friction between the block and the inclined plane is \(0.8\), then the time taken by the same block to reach the bottom of the plane is

A man of mass \(60 \text{ kg}\) is standing in a lift moving up with a retardation of \(2.8 \text{ ms}^{-2}\). The apparent weight of the man is