List of top Physics Questions asked in KEAM

The flow of current of \(2\) A through a straight solenoid of length \(2\) m produces a magnetic field of \(2\pi \times 10^{-4}\) T at its centre. Then the number of turns in the solenoid is

The plane of a circular loop of area \(150\ \text{cm}^2\) is perpendicular to a uniform magnetic field of \(0.5\) T. If the loop is turned such that its plane is in the direction of the field in \(0.5\) s, then the induced emf produced is

If a current carrying circular loop is suspended in a uniform magnetic field \(\vec{B}\), then

In a uniform magnetic field \(\vec{B}\), a bar magnet of magnetic moment \(M\) is kept suspended at an angle of \(60^\circ\) with respect to \(\vec{B}\). The work done to turn it from \(60^\circ\) to \(90^\circ\) with respect to the field is

Three cells of $3$ V, $4$ V and $4$ V with respective internal resistances $0.5\,\Omega$, $0.75\,\Omega$ and $0.75\,\Omega$ are connected in series to a resistor of $4\,\Omega$. Then the current in the circuit is

$A$, $B$ and $C$ are three points in space forming an equilateral triangle of side $10$ cm. If a point charge $8\,\mu C$ is placed at $A$, then the work done in moving a unit charge from $B$ to $C$ is

The ratio of the rate of flow of electrons through three resistors connected in parallel to a voltage source $V$ is $3 : 2 : 1$, then the ratio of their respective resistance values is

The ratio of the heat produced in a $2\,\Omega$ and a $4\,\Omega$ resistor connected in series with a voltage source of $12$ V is

Three capacitors $A,B,C$ with respective capacitance of $1\,\mu F$, $2\,\mu F$ and $3\,\mu F$ are connected as shown. For a given voltage source $V$ connected across them, the combination that can store the maximum energy is

If an infinitely long uniformly charged wire produces an electric field of intensity $E$ at a distance $d$ from it, then the linear charge density $\lambda$ of the wire is

The equipotential surface of a system of two point charge $5\,\mu C$ and $-5\,\mu C$ at points $A$ and $B$ separated by $80$ cm is a plane perpendicular to the line connecting $A$ and $B$ at

If an ideal heat engine with an efficiency of $40\%$ rejects heat at $27^\circ$C, then it should have absorbed heat at

With Laplace correction in Newton’s formula for the velocity of sound in gases, the velocity of sound in monoatomic gas at STP is

If the temperature $T$ of oxygen molecule is raised to $9T$, then its root mean square speed $v$ is increased to

Two perfect monoatomic gases at temperatures \(300\) K and \(410\) K are mixed without any loss of heat. If \(10^{24}\) and \(10^{23}\) are the number of molecules in the respective gases, then the temperature of the mixture is

For a particle executing simple harmonic motion with amplitude $A$ and time period $T$ along x-axis, the time taken by the particle to move from $x = 0$ to $x = A$ is

If the temperature of $2$ moles of krypton gas is increased from $-11^\circ$C to $89^\circ$C at constant volume, then (specific heat at constant volume of krypton is $C_V$)

Lakes and ponds freeze at the top surface with water below. This phenomenon is due to

If the magnitude of gravitational potential energy of an object of mass $200$ kg at a height of $3.6 \times 10^6$ m from the earth surface is $6 \times 10^6$ J then its value at a height of $5.6 \times 10^6$ m is (Radius of earth is $6.4 \times 10^6$ m)

The ratio of the weights of an object of mass $m$ at a height $R$ and $2R$ from the surface of earth is ($R$ is the radius of earth)

The force required to increase the length of a thin copper wire of cross-sectional area \(0.1\ \text{cm}^2\) by \(0.1\%\) is (Young’s modulus of copper is \(11 \times 10^{10}\ \text{N m}^{-2}\))

If a huge tank has a small side hole at a depth of $2$ m from the surface of water, then the velocity of water flowing through the hole is ($g = 10\ \text{m s}^{-2}$)

If \(10\) identical silver coins each of mass \(m\) are placed one over the other, then force on the \(6^{\text{th}}\) coin from the bottom is

A body initially at rest breaks up into two pieces of masses $M$ and $3M$ and move with a total kinetic energy of $E$, then the kinetic energy of the piece of mass $M$ is

If the maximum acceleration of a moving platform to keep a box of mass \(5\) kg on it without sliding is \(3\ \text{m s}^{-2}\), then the static friction between the box and floor of the platform is (\(g = 10\ \text{m s}^{-2}\))