Karnataka CET- 2014(Physics)

A physical quantity Q is found to depend on observables x, y and z, obeying relation Q = (x³y²/z) The percentage error in the measurements of x, y and z are 1%, 2% and 4% respectively. What is percentage error in the quantity Q?

Which of the following is not a vector quantity?

A car moves from A to B with a speed of 30 kmph and from B to A with a speed of 20 kmph. What is the average speed of the car?

A body starts from rest and moves with constant acceleration for t s. it travels a distance x₁ in first half of time and x₂ in next time of time, then

A person is driving a vehicle at uniform speed of 5 ms^-1 on a level curved track of radius 5 m. the coefficient of static friction between tyres and road is 0.1. will the person slip while taking the turn with the same sped? Take g = 10 ms^-2.
Choose the correct statement

A stone is thrown vertically at a speed of 30 ms^-1 making an angle of 45º with the horizontal. What if the maximum height reached by the stone? Take g = 10 ms^-2

What is a period of evolution of earth satellite? Ignore the height of satellite above the surface of earth
Given:

1. The value of gravitational acceleration g = 10 ms^-2
2. Radius of earth R_E = 6400 km. Take π = 3.14.

A period of geostationary satellite is

What is the source of temperature of the Carnot engine required to get 70% efficiency? Given sink temperature = 27 ºC

A 10 kg metal block is attached to a spring of spring constant 1000 Nm^-1. A block is displaced from equilibrium position by 10 cm and released. The maximum acceleration of the block is

A metallic wire of 1 m length has a mass of 10 × 10^-3 If a tension of 100 N is applied to a wire, what is the speed of transverse wave?

A train is approaching towards a platform with a speed of 10 ms^-1 while blowing a whistle of frequency 340 Hz. What is the frequency of whistle heard by a stationary observer on the platform? Given speed of sound = 340 ms^-1.

A rotating wheel changes angular speed from 1800 rpm to 3000 rpm in 20 s. what is the angular acceleration assuming to be uniform?

A flow of liquid is streamline if the Reynold number is

A pipe of 30 cm long and open at both the ends produces harmonics. Which harmonic mode of pipe resonates a 1.1 kHz source? Given speed of sound in air = 330 ms^-1.

In anomalous expansion of water, at what temperature, the density of water is maximum?

An aeroplane execute a horizontal loop at a speed of 720 kmph with its wings banked at 45 ºC. What is the radius of the loop? Take g = 10 ms^-2.

A body having a moment of inertia about its axis of rotation equal to 3 kg-m² is rotating with angular velocity of 3 rad s^-1. Kinetic energy of this rotating body is same as that of a body of mass 27 kg moving with velocity v. The value of v is

A cycle tyre bursts suddenly. What is the type of this process?

An object is placed at 20 cm in front of a concave mirror produces three times magnified real image. What is focal length of the concave mirror?

A focal length of a lens is 10 cm. What is power of a lens in dioptre?

Diameter of the objective of a telescope is 200 cm. what is the resolving power of a telescope? Take wavelength of light = 5000 Å

A polarized light of intensity I₀ is passed through another polarizer whose pass axis makes an angle of 60º with the pass axis of the former. What is the intensity of emergent polarized light from second polarizer?

What is the de Broglie wavelength of the electron accelerated through a potential difference of 100 Volt?

The maximum kinetic energy of the photoelectrons depends only on

Which of the following spectral series of hydrogen atom is lying in visible range of electromagnetic wave?

What is the energy of the electron revolving in third orbit expressed in eV?

The relation between half life (T) and decay constant (λ) is

A force between two protons is same as the force between proton and neutron. The nature of the force is

In n type semiconductor, electrons are majority charge carriers but it does not show any negative charge. The reason is

If α-current gain of a transistor is 0.98. What is the value of β-current gain of the transistor?

A tuned amplifier circuit is used to generate a carrier frequency of 2 MHz for the amplitude modulation. The value of √LC is

If a charge on the body is 1 nC, then how many electrons are present on the body?

The equal and opposite charges of masses m₁ and m₂ are accelerated in a uniform electric field through the same distance. What is the ratio of their accelerations if their ratio of masses is m₁/m₂ = 0.5?

What is the electric potential at a distance of 9 cm from 3 nC?

A voltmeter reads 4 V when connected to a parallel plate capacitor with air as a dielectric. When a dielectric slab is introduced between plates for the same configuration, voltmeter reads 2 V. What is the dielectric constant of the material?

A spherical conductor of radius 2 cm is uniformly charged with 3 nC. What is the electric field at a distance of 3 cm from the centre of the sphere?

A carbon film resistor has colour code Green Black Violet Gold. The value of the resistor is

Two resistors of resistances 2 Ω and 6 Ω are connected in parallel. This combination is then connected to a battery of emf 2V and internal resistance 0.5 Ω. What is the current flowing through the battery?

The equivalent resistance of two resistors connected in series is 6 Ω and their parallel equivalent resistance is 4/3 Ω. What are the values of resistances?

In a potentiometer experiment of a cell of emf 1.25 V gives balancing length of 30 cm. If the cell is replaced by another cell, balancing length is found to be 40 cm. What is the emf of second cell?

A charged particle experiences magnetic force in the presence of magnetic field. Which of the following statement is correct?

If a velocity has both perpendicular and parallel components while moving through a magnetic field, what is the path followed by a charged particle?

A gyromagnetic ratio of the electron revolving in a circular orbit of hydrogen atom is 8.8 × 10¹⁰ C kg^-1. What is the mass of the electron? Given the charge of the electron = 1.6 × 10^-19 C

What is the value of shunt resistance required to convert a galvanometer of resistance 100 Ω into an ammeter of range 1A?

Given: Full scale deflection of the galvanometer is 5 mA

A circular coil of radius cm and 100 turns carries a current 1A. What is the magnetic moment of the coil?

A susceptibility of a certain magnetic material is 400. What is the class of the magnetic material?

A solenoid of inductance 2H carries a current of 1 A. What is the magnetic energy stored in a solenoid?

A multimeter reads a voltage of a certain A.C. source as 100 V. What is the peak value of voltage of A.C. source?

A series LCR circuit contains inductance 5 mH, capacitance 2 μF and resistance 10 Ω. If a frequency A.C. source is varied, what is the frequency at which maximum power is dissipated?

A step down transformer has 50 turns on secondary and 1000 turns on primary winding. If a transformer is connected to 220 V 1A A.C. source, what is output current of the transformer?

The average power dissipated in A.C. circuit is 2 watt. If a current flowing through a circuit is 2 A and impedance is 1 Ω, what is the power factor of the AC circuit?

A plane electromagnetic wave of frequency 20 MHz travels through a space along x direction. If the electric field vector at a certain point in space is 6 V m^-1, what is the magnetic field vector at that point?

Two capacitors of 10 PF and 20 PF are connected to 200 V and 100 V sources respectively. If they are connected by the wire, what is the common potential of the capacitors?