List of top Physics Questions asked in AP EAMCET

In the given circuit, batteries are ideal and Galvanometer shows zero deflection, then the value of 'R' is:


 

If the potential difference across \(PQ\) is 4V, the potential difference across \(A\) and \(B\) in the given figure is:


 

Two separated conducting spheres \(S_1\) and \(S_2\), of radii \(3R/4\) and \(R/4\) having \(15 \mu C\) and \(-3 \mu C\) charges respectively are at a large distance. They are now connected by a conducting wire. After a long time, the charges on \(S_1\) and \(S_2\) respectively are:
A 200 volt battery is connected across the series combination of two capacitors 4 \(\mu\)F and 6 \(\mu\)F. The amount of energy stored in this series combination is:

As shown in the figure, a surface encloses an electric dipole with charges \( \pm6 \times 10^{-6} \, {C} \). The total electric flux through the closed surface is:


 

Young double slit arrangement is placed in a liquid medium of 1.2 refractive index. Distance between the slits and screen is 2.4 m. 
Slit separation is 1 mm. The wavelength of incident light is 5893 Å. The fringe width is:

The following statement is true in case of total internal reflection:

A train moves towards a stationary observer with speed 72 m/s\(^{-1}\). The train blows its horn and its frequency heard by observer is \(f_1\). 
If the train speed is reduced to 36 m/s\(^{-1}\), the frequency heard by observer is \(f_2\). Then \( \frac{f_1}{f_2} \) is (given \(v = 340 { m/s}^{-1}\)):

One kilogram of a diatomic gas is at a pressure of \(2 \times 10^4 { N/m}^{-2}\) and the density of the gas is \(4 { kg/m}^{-3}\). The internal energy of this gas:
A geyser uses natural gas as fuel. It heats water flowing at the rate of 3.0 liters per minute from 27°C to 77°C. The approximate rate of consumption of the fuel, if the heat of combustion of gas fuel is \(4.0 \times 10^4 { J/g}^{-1}\):

Helium gas goes through a cycle ABCDA (consisting of two isochoric and isobaric lines) as shown in figure. Assuming the gas to be an ideal gas. Efficiency of this cycle is nearly:


 

A piston divides a closed gas cylinder into two parts. Initially, the piston is kept pressed such that one part has pressure P and volume 5V and the other part has pressure 8P and volume V. The piston is now left free. The new pressure if the process is isothermal:
A vessel contains 8 g of air at 400 K. Some amount of air leaks out through the hole provided to it. After some time, pressure is halved and temperature is changed to 300 K. Find the mass of the air escaped.

A glass capillary tube with a radius \( r = 0.02 \, {cm} \) is immersed into water to a depth of \( d = 2 \, {cm} \). To blow an air bubble out of the lower end of the tube, the pressure required is: 
Given:
Surface tension \( T = 7 \times 10^{-2} \, {N/m}^{-1} \)
Density of water \( \rho = 10^3 \, {kg/m}^{-3} \)
Acceleration due to gravity \( g = 10 \, {m/s}^{-2} \)

If the ratio of lengths, radii, and Young's moduli of steel and brass wires are \(a\), \(b\), and \(c\) respectively, their respective loads are in the ratio 5:3, then the corresponding ratio of increase in their lengths would be:
Two bodies of masses \( m_1 \) and \( m_2 \) are initially at rest at an infinite distance apart. They are then allowed to move towards each other under mutual gravitational attraction. The relative velocity of approach at a separation distance \( r \) between them is:
A pan with a set of weights attached to a light spring oscillates with a time period of 0.6 s. When an additional weight is added, the time period becomes 0.7 s. The extension due to the additional weight is:
A spring with spring constant \( K \) stores 5 J energy when stretched by 25 cm. It was fixed at one end in vertical position and the other end is attached by mass \( m \). Its frequency is 5 oscillations/sec. Then the values of \( m \) and \( K \) are:

A thin circular ring and a circular disc have the same mass and moment of inertia about their centers perpendicular to the plane. 
Then the ratio of their radii is:

If the earth shrinks until its radius becomes \(\frac{3}{4}\) of its original, the new duration of the day would be (mass unchanged):

A man of mass 70 kg jumps to a height of 0.8 m from the ground, then the momentum transferred by the ground to the man is 
(g = 10 m/s\(^{-2}\)):

A truck of mass 1200 kg moves over an inclined plane raising 1 in 20, with a speed of 18 kmph. The power of the engine is 
(g = 10 m/s\(^{-2}\)):

Find the least horizontal force \( P \) to start motion of any part of the system of three blocks resting upon one another as shown in the figure. The weights of blocks are \( A = 300 \, {N}, B = 100 \, {N}, C = 200 \, {N} \). The coefficient of friction between \( A \) and \( C \) is 0.3, between \( B \) and \( C \) is 0.2 and between \( C \) and the ground is 0.1.


 

A body of mass 4 kg is moving with a velocity 6 ms\(^{-1}\) on a smooth surface. If it is brought to rest in 4 s, the force applied is:
A stone is projected at an angle of 30° to the horizontal. The ratio of kinetic energy at the point of projection to the potential energy at the highest point of flight will be: