Karnataka CET- 2015(Physics)

The ratio of the dimensions of Planck constant and that of moment of inertia has the dimensions of

A particle is projected with a velocity v so that its horizontal range twice the greatest height attained. The horizontal range is

A stone of mass 0.05 kg is thrown vertically upwards. What is direction and magnitude of net force on the stone during its upward motion?

The kinetic energy of a body of mass 4 kg and momentum 6Ns will be

The ratio of angular speed of a second-hand to the hour-hand of a watch is

If the mass of a body is M on the surface of the earth, the mass of the same body on the surface of the moon is

Moment of Inertia of a thin uniform rod rotating about the perpendicular axis passing through its centre is I. If the same rod is bent into a ring and its moment of inertia about its diameter is I’, then the ratio I/I’ is

The ratio of hydraulic stress to the corresponding strain is known as

The efficiency of a Carnot engine which operates between the two temperatures T₁ = 500 K and T₂ = 300 K is

Water is heated from 0˚C to 10˚C. Then its volume

1 gram of ice is mixed with 1 gram of steam. At thermal equilibrium, the temperature of the mixture is

The ratio of kinetic energy to the potential energy of a particle executing SHM at a distance equal to half its amplitude, the distance being measured from its equilibrium position is

When two turning forks A and B are sounded together, 4 beats per second are heard. The frequency of the fork B is 384 Hz. When one of the prongs of the fork A is filled and sounded with B, the beat frequency increases, then frequency of the fork A is

A stretched string is vibrating in the second overtone, then the number of nodes and antinodes between the ends of the string are respectively

Two spheres carrying charges + 6 μC and + 9 μC, separated by a distance d, experiences a force of repulsion F. When a charge of of – 3 μC is given to both the sphere and kept at the same distance as before, the new force of repulsion is

Pick out the statement which is incorrect

The angle between the dipole moment and electric field at any point on the equatorial plane is

A spherical shell of radius 10 cm is carrying a charge q. If the electric potential at distances 5 cm, 10 cm and 15 cm from the centre of the spherical shell is V₁, V₂ and V₃ respectively, then

A parallel plate capacitor is charged and then isolated. The effect of increasing the plate separation on charge, potential and capacitance respectively are

Four identical cells of emf E and internal resistance r are to be connected in series. Suppose if one of the cell is connected wrongly, the equivalent emf and effective internal resistance of the combination is

Three resistances 2Ω, 3Ω and 4Ω are connected in parallel. The ratio of currents passing through them when a potential difference is applied across its ends will be

In Wheatstones network P = 2 Ω, Q = 2 Ω, R = 2 Ω and S = 3 Ω. The resistance with which S is to shunted in order that the bridge may e balanced is

The resistance of the bulb filament is 100 Ω at a temperature of 100˚C. If its temperature co-efficient of resistance be 0.005 per ˚C, its resistance will become 200 Ω at a temperature

Two concentric coils each of radius equal to 2 π cm are placed right angles to each other. If 3A and 4A are the currents flowing through the two coils respectively. The magnetic induction (in Wb m^-2) at the centre of the coils will be

A proton beam enters a magnetic field of 10^-4 Wb m^-2 If the specific charge of the proton is 10¹¹ C kg^-1 and its velocity is 10⁹ ms^-1, then the radius of the circle described will be

A cyclotron is used to accelerate

A galvanometer of resistance 50 Ω gives a full scale deflection for a current 5 × 10⁴ The resistance that should be connected in series with the galvanometer to read 3 V is

Two parallel wires 1 m apart carry currents of 1 A and 3 A respectively in opposite directions. The force per unit length acting between these two wires is

If there is no torsion in the suspension thread, then the time period of magnet executing SHM is

Core of electromagnets are made of ferromagnetic material which has

The magnetic susceptibility of a paramagnetic material at – 73˚C is 0.0075 and its value at – 173 ˚C will be

Two coils have a mutual inductance 0.005 H. the current changes in the first coil according to the equation i = i_m sin ωt where i_m = 10 A and ω = 100 π rad s^-1. The maximum value of the emf induced in the second coil is

An aircraft with a wingspan of 40 m flies with a speed of 1080 km/hr in the eastward direction at a constant altitude in the northern hemisphere, where the vertical component of the earth’s magnetic field 1.75 × 10^-5 Then the emf developed between the tips of the wings is

In an LCR circuit, at resonance

A transformer is used to light 100 W – 110 V lamp from 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is

The average power dissipated in a pure inductor is

If ε₀ and μ₀ are the permittivity and permeability of force space and ε and μ are the corresponding quantities for a medium, then refractive index of the medium is

A person wants a real image of his own, 3 times enlarged. Where should he stand in front of a concave mirror of radius of curvature 30 cm?

Calculate the focal length of a reading glass of a person if his distance of distinct vision is 75 cm.

To observe diffraction, the size of the obstacle

The polarizing angle of glass is 57 ˚. A ray of light which is incident at this angle will have an angle of refraction as

Light of two different frequencies whose photons have energies 1 eV and 2.5 eV respectively, successively illuminate a metallic surface whose work function is 0.5 eV. Ratio of maximum speeds of emitted electrons will be

Find the de-Broglie wavelength of an electron with kinetic energy of 120 eV

An α-particle of energy 5 MeV is scattered through 180˚ by gold nucleus. The distance of closest approach is of the order of

If an electron in hydrogen atom jumps from an orbit of level n = 3 to an orbit of level n = 2, the emitted radiation has a frequency (R = Rydberg constant, C = velocity of light)

What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum. (take hc = 1240 eV nm)

A nucleus at rest splits into two nuclear parts having radii in the ratio 1: 2. Their velocities are in the ratio

The half life of a radioactive substance is 20 minutes. The time taken between 50% decay and 87.5% decay of the substance will be

A radioactive decay can form an isotope of the original nucleus with the emission of particles

An LED is constructed from a pn junction based on a certain semi-conducting material whose energy gap is 1.9 eV. Then the wavelength of the emitted light is

Amplitude modulation has

The input characteristics of a transistor in CE mode is the graph obtained by plotting

The given truth table is for

The wave used for line-of-sight (LOS) communication is