List of top Physics Questions asked in AP EAPCET

Match the following physical quantities with their dimensional formulae: \[ \begin{array}{ll} \text{A) Gravitational potential} & \text{I) } LT^{-2} \\ \text{B) Gravitational potential energy} & \text{II) } L^{2}T^{-2} \\ \text{C) Gravitational constant} & \text{III) } ML^{2}T^{-2} \\ \text{D) Gravitational intensity} & \text{IV) } M^{-1}L^{3}T^{-2} \end{array} \] The correct match is:

An object is projected with an angle of \( 60^{\circ} \) with horizontal with a velocity V. During the path, when it makes \( 30^{\circ} \) with horizontal, its velocity becomes 10 \( ms^{-1} \), then V is:

Two bodies projected with same velocity at different angles attain same range. If the time of flights of the bodies are \( T_{1} \) and \( T_{2} \) respectively, then \( \frac{T_{1}}{T_{2}} \) is:

In the given logic circuit, the bulb will glow for which of the following combinations: figure [H]

figure

A TV tower has a height of 100m. To double the coverage distance of the tower, the height of the tower must be increased by:

Two radioactive materials $A_1$ and $A_2$ have half-life periods 20 s and 10 s respectively. Initially a mixture of these materials contain 40 g of $A_1$ and 160 g of $A_2$. The time taken for $A_1$ and $A_2$ to become equal in the mixture is:

The magnetic field in a plane electromagnetic wave is $B_y = 2 \times 10^{-7} \sin(0.5 \times 10^3 x + 1.5 \times 10^{11} t)$. The correct expression for electric field of the wave is:

Two identical parallel metal plates A and B, having fine holes at their centers are connected to a power supply as shown in the figure. An electron having energy 200 eV is directed to pass through these holes from A to B. The de Broglie wavelength of the electron when it comes out of plate B is:

A series LCR circuit with $R=40~\Omega$, $L=3H$ and $C=20~\mu F$ is connected to a 400 V AC supply with variable frequency. When the frequency of supply equals the natural frequency of the circuit, the average power transferred to the circuit in one complete cycle is:

The energy required to excite an electron from 1st to 3rd Bohr orbit in $Li^{2+}$ ion is:

A conducting square loop of side L moves with a uniform speed V in a region of uniform magnetic field acting perpendicular to the plane of the loop and directed into it as shown in figure. The emf induced in the loop is:

In the part of a circuit shown in figure, determine the current through 20 $\Omega$ resistance, if Potential at 'A' is 30 V, Potential at B = Potential at C = 20 V: figure [H]

figure

A wire of length L carrying a current of I ampere is initially bent in the form of a circular coil of one turn. If the same wire is bent into a circular coil of two turns without any change in the current, then the magnetic field at the center of the coil:

A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10 divisions per mA and Voltage sensitivity is 2 divisions per millivolt. In order to read each division 1 volt, the resistance in ohms to be connected in series is:

A magnetic needle kept in a non-uniform magnetic field experiences:

When dielectric is inserted between the plates of a capacitor with battery connected, energy increases because of:

If power dissipated in the $9~\Omega$ resistor in the circuit shown is 36 W, the potential difference across the $2~\Omega$ resistor is: figure [H]

figure

If Young's double slit experiment is done in air first and then if the experiment is conducted by immersing the apparatus in water, the fringe width:

When a light ray incidents on an equilateral prism of material of refractive index $\sqrt{2}$, the angle of minimum deviation is D. If the light ray incidents on another equilateral prism of material of refractive index $\sqrt{3}$, then the angle of minimum deviation is:

For an astronomical telescope of length 126 cm in normal adjustment, if the focal length of the objective is 850 % more than that of its eyepiece, then the focal length of the eyepiece is:

The mass and length of a string are 10 g and 100 cm respectively. If the tension in the string is increased from 400 N to 900 N, then the increase in the frequency of transverse vibration of the string is:

Electric flux through cube of side 'a' enclosing charge 'q' is:

If electric potential is constant in a region, electric field in that region is:

If the mean free path of a nitrogen molecule in a vessel containing nitrogen at a pressure of 2.1 atm and a temperature of $27^{\circ}C$ is $\lambda$, then its mean free path at a pressure of 1.65 atm and a temperature of $57^{\circ}C$ is:

A Carnot engine having an efficiency of 20 % is used as a refrigerator. If the amount of heat absorbed from the reservoir at low temperature is 200 J, then the work done on the refrigerator is: