KCET 2019

An electric dipole is kept in non-uniform electric field. It generally experiences

A system of two charges separated by a certain distance apart stores electrical potential energy. If the distance between them is increased, the potential energy of the system

The figure gives the electric potential \(V\) as a function of distance through four regions on \(x\)-axis. Which of the following is true for the magnitude of the electric field \(E\) in these regions?

An aluminium sphere is dipped into water. Which of the following is true?

A cylindrical container containing water has a small hole at height of \(H=8 \mathrm{~cm}\) from the bottom and at a depth of \(2 \mathrm{~cm}\) from the top surface of the liquid. The maximum horizontal distance travelled by the water befo...

A satellite is orbiting close to the earth and has a kinetic energy \(K\). The minimum extra kinetic energy required by it just overcome the gravitation pull of the earth is

One mole of \(\mathrm{O}_2\) gas is heated at constant pressure starting at \(27^{\circ} \mathrm{C}\). How much energy must be added to the gas as to double its volume?

A thermodynamic system undergoes a cyclic process \(A B C\) as shown in the diagram. The work done by the system per cycle is

An object with mass \(5 \mathrm{~kg}\) is acted upon by a force, \(\mathbf{F}=(-3 \hat{\mathbf{i}}-4 \hat{\mathbf{j}}) \mathrm{N}\). If its initial velocity at \(t=0\) is $$\mathbf{v}=(3 \hat{\mathbf{i}}+12 \hat{\mathbf{j}}) \mathrm{m} / \m...

A magnetic needle has a magnetic moment of \(5 \times 10^{-2} \mathrm{~Am}^2\) and moment of inertia \(8 \times 10^{-6} \mathrm{~kgm}^2\). It has a period of oscillation of \(2 \mathrm{~s}\) in a magnetic field \(\mathbf{B}\). The magnitude...

A circular current loop of magnetic moment \(M\) is in a arbitrary orientation in an external uniform magnetic field \(\mathbf{B}\). The work done to rotate the loop by \(30^{\circ}\) about an axis perpendicular to its plane is

In a permanent magnet at room temperature

The trajectory of a projectile projected from origin is given by the equation \(y=x-\frac{2 x^2}{5}\). The initial velocity of the projectile is

The given graph shows the variation of velocity \(v\) with position \(x\) for a particle moving along a straight line

Which of the following graph shows the variation of acceleration a with position x?

A toroid has 500 turns per meter length. If it carries a current of \(2 \mathrm{A}\), the magnetic energy density inside the toroid is

In a cyclotron a charged particle

The number of turns in a coil of galvanometer is tripled, then

Coersivity of a magnet where the ferromagnet gets completely demagnetized is \(3 \times 10^3 \mathrm{~Am}^{-1}\). The minimum current required to be passes in a solenoid having 1000 turns per metre, so that the magnet gets completely demagn...

The magnetic fields at the centre O in the given figure is

A certain prism is found to produce a minimum deviation of \(38^{\circ}\). It produce a deviation of \(44^{\circ}\) when the angle of incidence is either \(42^{\circ}\) or \(62^{\circ}\). What is the angle of incidence when it is undergoing...

A transparent medium shows relation between \(i\) and \(r\) as shown. If the speed of light in vacuum is \(c\), the Brewster angle for the medium is

A point object is moving uniformly towards the pole of a concave mirror of focal length \(25 \mathrm{~cm}\) along its axis as shown below. The speed of the object is \(1 \mathrm{~ms}^{-1}\). At \(t=0\), the distance of the object from the m...

A particle is moving uniformly along a straight line as shown in the figure. During the motion of the particle from \(A\) to \(B\), the angular momentum of the particle about \(O\)

The conductivity of semiconductor increases with increase in temperature because

For a transistor amplifier, the voltage gain

In the following circuit, what are P and Q?

A piston is performing S.H.M. in the vertical direction with a frequency of \(0.5 \mathrm{~Hz}\). A block of \(10 \mathrm{~kg}\) is placed on the piston. The maximum amplitude of the system such that the block remains in contact with the pi...

If \(P, Q\) and \(R\) are physical quantities having different dimensions, which of the following combinations can never be a meaningful quantity?

If Young's double slit experiment, using monochromatic light of wavelength \(\lambda\), the intensity of light at a point on the screen where path difference is \(\lambda\) is \(K\) units. The intensity of light at a point where path differ...

The equation of a stationary wave is \(y=2 \sin \left(\frac{\pi x}{15}\right) \cos (48 \pi t)\). The distance between a node and its next antinode is