List of top Physics Questions asked in TS EAMCET

In a common emitter transistor circuit, if the emitter current is changed by 4 mA, the collector current changes by 3.5 mA, then the current gain is

If two electromagnetic waves with electric fields given by \[ \vec{E_1} = E_0 \sin (kx - \omega t) \hat{j} \] and \[ \vec{E_2} = E_0 \sin (kx - \omega t + \pi) \hat{j} \] - interfere, then the peak value of the electric field of the resultant wave is

An electron moving with a velocity of \(4.8 \times 10^6 \, \text{ms}^{-1}\) enters a uniform magnetic field of \(0.182 \, T\) in a direction perpendicular to the field. - The radius of the circular path in which the electron moves under the influence of the magnetic field is - (Mass of electron \(= 9.1 \times 10^{-31} \, kg\) and charge of electron \(= 1.6 \times 10^{-19} \, C\))

A long solenoid of length \(75\) cm carries a current of \(3.5\) A. If the number of turns of the solenoid is \(600\), the magnitude of the magnetic field inside the solenoid is

A convex lens of focal length 10 cm is placed coaxially at a distance of 4 cm to the right of another convex lens of focal length 16 cm. If an object is placed at a distance of 8 cm to the left of the convex lens of focal length 16 cm, then the distance of the final image from the object is:

The coefficient of performance of a refrigerator is 5. If it is placed in a room at a temperature of 39°C, the temperature inside the refrigerator is:

A wooden cube is floating in a bucket of water with \(\frac{3}{4}\) of its volume immersed. If this bucket with the wooden block is now placed in a lift moving down with an acceleration of \(\frac{g}{2}\), the fraction of volume of the wooden cube immersed in water is:

A body weighs the same on the surfaces of two planets of densities \( p_1 \) and \( p_2 \). The ratio of the radii of the planets is:

The change in moment of inertia of a solid sphere of mass \( M \), radius \( R \), for a small change in temperature \( \Delta t \) is:

A copper wire of cross-sectional area 0.01 cm\(^2\) is subjected to a tension of 22 N. If Young’s modulus and Poisson’s ratio of copper are \(1.1 \times 10^{11}\) Nm\(^2\) and 0.32 respectively, then the change in the cross-sectional area of the wire is:

The amplitude of a damped harmonic oscillator becomes \( \frac{1}{n} \) times its initial amplitude \( A_0 \) at the end of 20 oscillations. The amplitude of the oscillator when it completes 40 oscillations is:

A soap bubble is given a negative charge. The pressure inside the bubble:

A body is projected from the surface of the earth with a velocity of \( 10 \sqrt{3} \, \text{m/s} \) such that its range is maximum. The velocity of the body at half of the maximum height is:

A body of mass 3 kg is thrown vertically upward from the ground with a velocity of \( 10 \, \text{ms}^{-1} \). If the maximum height reached by the body is 4.7 m, then the loss of energy due to air resistance is:

A thin circular ring of mass 0.2 kg is rotating about its axis with an angular speed of 51 rad/s. Two particles having mass 2 g each are now attached at diametrically opposite points on the ring. Then the angular speed of the system is:

A body of mass 10 kg is kept on a rough horizontal surface. If the force applied on the body is increased by 80 N, then the acceleration of the body increases by:

Four bodies of masses 8 kg, 2 kg, 4 kg and 2 kg are placed at the four corners A, B, C and D respectively of a square ABCD of diagonal 80 cm. The distance of the center of mass of the system from the corner A is:

A block enters a rough horizontal surface with a speed of \( 6 \, \text{ms}^{-1} \) at \( x = 1.5 \, \text{m} \) and leaves the rough horizontal surface with a speed of \( 4 \, \text{ms}^{-1} \) at \( x = 2.5 \, \text{m} \). If the retarding force acting on the block is \( F = -25x \, \text{N} \) (where \( F \) is in newton and \( x \) is in meter), then the mass of the block is:

The maximum range of a projectile is 80 m. If the projectile is projected with the same speed at an angle of \( \frac{\pi}{12} \) with the horizontal, then the range of the projectile is:

A force of 20 N acts on a body at rest for a time of 2 s and then a force of 60 N acts for a time of 1.5 s in the opposite direction. If the final velocity of the body is 10 m/s in the direction of the 60 N force, then the mass of the body is:

A ball of mass 200 g moving with certain velocity collides with another ball of mass 600 g at rest. If the coefficient of restitution is 0.6, the ratio of the velocity of 600 g ball after collision and the velocity of 200 g ball before collision is: