Karnataka CET- 2012(Physics)

The dimensional formula of physical quantity is M^aL^bT^c. Then the physical quantity is

A person throws balls into air vertically upward in regular intervals of time of one second. The next ball is thrown when the velocity of the ball thrown earlier becomes zero. The height to which the balls rise is ______ (Assume, g = 10 ms^-2)

The circular motion of a particle with constant speed is

Which of the following is INCORRECT?

Intensity level of sound whose intensity is 10^-8 wm^-2 is _____ dB

A point source of light is kept below the surface of water (n_w = 4/3) at a depth of √7 m. The radius of the circular bright patch of light noticed on the surface of water is ____m

A monochromatic beam of light is travelling from medium A of refractive index n₁ to a medium B of refractive index n₂. In the medium A, there are x number of waves in certain distance. In the medium B, there are y number of waves in the same distance. Then, refractive index of medium A with respect to medium B is _____

In young’s double slit experiment, fringes of width β are produced on a screen kept at a distance of 1 m from the slit. When the screen is moved away by 5 × 10^-2 m, fringe width changes by 3 × 10^-5 The separation between the slits is 1 v 10-3 m. The wavelength of the light used is _____ nm.

For sustained interference fringes in double slit experiment, essential condition/s is/are

1. Sources must be coherent
2. The intensities of the two sources must be equal

Here, the correct option/s is/are

In single slit experiment, the width of the slit is reduced. Then, the linear width of the principal maxima _____

In the uniform electric field of E = 1 × 10⁴ NC^-1, an electron is accelerated from rest. The velocity of the electron when it has travelled a distance of 2 × 10^-2 m is nearly ____ ms^-1 (e/m of electron = 1.8 × 10¹¹ Ckg^-1)

A straight current carrying conductor is kept along the axis of circular loop carrying current. The force exerted by the straight conductor on the loop is ______

A resistor of 500 Ω, an inductance of 0.5 H are in series with an a.c. which is given by V = 100√2 sin(1000 t). The power factor of the combination is

Pick out the WRONG statement.

A proton and an alpha particle are accelerated under the same potential difference. The ratio of de-Broglie wavelengths of the proton and the alpha particle is

Spectrum of sunlight is an example for

In hydrogen atom, electron excites from ground state to higher energy state and its orbital velocity is reduced to 1/3^rd of its initial value. The radius of the orbit in the ground state is R. The radius of the orbit in that higher energy state is

Decay constants of two radio-active samples A and B are 15x and 3x respectively. They have equal number of initial nuclie. The ratio of the nymber of nuclie left in A and B after a time 1/6x is

Mass numbers of the elements A, B, C and D are 30, 60, 90 and 120 respectively. The specific binding energy of them are 5 MeV, 8.5 MeV, 8 MeV and 7 MeV respectively. Then, in which of the following reaction/s energy is released?

1. D → 2B
2. C → B+A
3. B → 2A

Copper and Germanium are cooled from room temperature to 100 K. Then the resistance of

The most stable particle in the Baryon group is

Frequencies of light incident on a system of scattering particles are in the ratio of 1 : 2. Then, the intensity of scattered light in a particular direction is _______

The ratio of the magnetic dipole moment to the angular momentum of the electron in the 1^st orbit of hydrogen atom is

Milk is an example for

A body of mass ‘m’ is travelling with a velocity ‘u’. When a constant retarding force ‘F’ is applied, it comes to rest after travelling a distance ‘s₁’. If the initial velocity is ‘2u’, with the same force ‘F’, the distance travelled before it omes to rest is ‘s₂’. Then

A block kept on a rough surface starts sliding when the inclination of the surface is “θ” with respect to the horizontal. The coefficient of static friction between the block and the surface is

Two bodies of masses m₁ and m₂ are acted upon by a constant force F for a time t. They start from rest and acquire kinetic energies E₁ and E₂ Then E₁/E₂ is

The X and Y components of a force F acting at 30^o to x-axis are respectively

Spheres of iron and lead having same mass are completely immersed in water. Density of lead is more than that of iron. Apparent loss of weight is W₁ for iron sphere and W₂ for lead sphere. Then W₁/W₂ is

A hot body is allowed to cool. The surrounding temperature is constant at 30 ^o The body takes time t₁ to cool from 90 ^oC to 89 ^oC and time t₂ to cool from 60 ^oC to 59.5 ^oC. Then

A particle executes SHM with amplitude 0.2 m and time period 24 s. The time required for it to move from the mean position to a point 0.1 m from the mean position is

White light is incident normally on a glass slab. Inside the glass slab,

If the two slits in Young’s double slit experiment are of unequal width, then

The phenomenon of polarization shows that light has _____ nature.

Acceleration of a charged particle of charge ‘q’ and mass ‘m’ moving in a uniform electric field of strength ‘E’ is

Two fixed charges A and B of 5 μC each are separated by a distance of 6 m. C is the mid point of the line joining A and B. A charge ‘Q’ of -5 μC is shot perpendicular to the line joining A and B through C with a kinetic energy of 0.06 J. The charge ‘Q’ comes to rest at a point D. The distance CD is

A capacitor of capacitance 10 μF is charged to 10 V. The energy stored in it is

A current of 2 A is passing through a metal wire of cross sectional area 2 × 10^-6 m². If the number density of free electrons in the wire is 5 × 10²⁶ m^-3, the drift speed of electrons is (given e = 1.6 × 10^-19 C)

Magnetic field at a distance r from an infinitely long straight conductor carrying a steady current varies as

An α-particle and a proton moving with the same kinetic energy enter a region of uniform magnetic field at right angles to the field. The ratio of the radii of the paths of α-particle to that of the proton is

Direction of current induced in a wire moving in a magnetic field is found using

X-rays, gamma rays and microwaves travelling in vacuum have

If n is the orbit number of the electron in a hydrogen atom, the correct statement among the following is

In a Ruby laser, the color of laser light is due to _____ atom.

The radius of ₂₉Cu⁶⁴ nucleus in Fermi is (given R₀ = 1.2 × 10^-15 m)

In a radioactive decay, an element _ZX^A emits four α-particles, three β-particles and eight gamma photos. The atomic number and mass number of the resulting final nucleus are

For a transistor, β = 100. The value of α is

The following truth table with A and B as inputs is for _____ gate.

‘n’ photons of wavelength ‘λ’ are absorbed by a black body of mass ‘m’. The momentum gained by the body is

A radioactive nucleus has specific binding energy ‘E₁’. It emits an α-particle. The resulting nucleus has specific binding energy ‘E₂’. Then