List of top Questions asked in AP EAPCET

Two resistances are connected in the two gaps of a meter bridge. The balancing point is obtained at 20 cm. When a resistance of \( 15 \, \Omega \) is connected in series with the smaller resistance of the two, the balancing point shifts to 40 cm. The value of smaller resistance is

A uniform metal wire carries a current of 2 A when an ideal cell of 3.4 V is connected across it. The wire has mass \( 8.92 \times 10^{-3} \, \text{kg} \), density \( 8.92 \times 10^3 \, \text{kg/m}^3 \) and resistivity \( 1.7 \times 10^{-8} \, \Omega \text{m} \). Then the length of the wire is

A circular coil of 30 turns and radius 8 cm carrying a current of 6 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 30° with the normal of the coil. The magnitude of the counter torque that must be applied to prevent the coil from turning is

A galvanometer has a deflection of 25 divisions for a current of 0.1 A flowing through it. Then the current sensitivity of the galvanometer is

In the cyclic process given in the P-V diagram, the work done is

In a Carnot’s engine, as the gas gives heat energy to the sink, then the temperature of the sink

The work done by a gas is maximum when it expands from a volume \( V_1 \) to \( V_2 \), then the expansion is

The relation between the pressure (P), volume (V) and average kinetic energy (E) of a gas is

Beats are produced by frequencies \( \nu_1 \) and \( \nu_2 \) (\( \nu_1>\nu_2 \)). The duration of time between two successive minima is

The image formed by a convex mirror of focal length 30 cm is a quarter of the size of the object. The distance of the object from the mirror is

A diffraction pattern is obtained by using a beam of red light. If the red light is replaced by the blue light, then

Two particles of masses 1 g and 2 g move towards each other with velocities 10 m/s and 20 m/s respectively. The velocity of the centre of mass of the system of the two particles is

A particle is executing simple harmonic motion. If the minimum time taken by the particle to move from extreme position to half of the amplitude is \( t_1 \), and the minimum time taken by the particle to move from mean position to half of the amplitude is \( t_2 \), then

The time taken for the amplitude of vibrations of a damped oscillator to drop to 25% of its initial value is \( t \). The time taken for its mechanical energy to drop to 50% of its initial mechanical energy is

Satellites which give high value data for remote sensing, meteorology, and environmental studies are

The fractional change in the volume of a glass slab when subjected to hydraulic pressure of 14 atm is (Bulk modulus of glass = \( 40 \times 10^9 \, \text{Nm}^{-2} \))

A capillary tube of radius 0.1 mm is dipped in water. The water rises to a height of 2 cm in the tube. If the surface tension of water is 0.072 Nm\(^{-1}\), the contact angle between water and wall of the tube is

A rod is found to be 0.05 cm longer at 40°C than it is at 10°C. The length of the rod at 0°C is (coefficient of linear expansion of the material of the rod = \( 1.5 \times 10^{-5} \, \text{°C}^{-1} \))

Two bodies of masses \( m_1 \) and \( m_2 \) are dropped from two different heights \( h_1 \) and \( h_2 \) respectively. The ratio of the times taken by the two masses to touch the ground is (neglect air resistance)

The magnitude of the external force acting on moving bodies can be known directly by

A body of mass 10 g is tied to a string of length 0.4 m and it is whirled in a horizontal plane with a speed of 6 m/s. Then the tension in the string is

The kinetic energy of a car is doubled when its velocity is increased by 1 m/s. Then the initial velocity of the car is

A car of mass 1000 kg having a velocity of 10 m/s collides a horizontally mounted spring. If the spring constant is 4000 N/m, then the maximum compression of the spring is

Three particles of each mass \( m \) are kept at the three vertices of an equilateral triangle. If \( I_1 \) is the moment of inertia of the system of the particles about an axis along one side of the triangle and \( I_2 \) is the moment of inertia of the system of the particles about an axis along the perpendicular bisector of a side, then \( I_1 : I_2 \) is

If \( u(n) = \int_0^{\frac{\pi}{2}} (1 + \sin t)^n \sin 2t \, dt,\; n \in \mathbb{N} \), then \( u(4) = \)