Karnataka CET- 2016(Physics)

A body falls freely for 10 sec. its average velocity during this journey (take g = 10 ms^-2)

Three projectiles A, B, and C are projected at an angle of 30˚, 45˚, 60˚ respectively. If R_A, R_B, R_C are ranges of A, B and C respectively, then (velocity of projection is same for A, B, and C)

Maximum acceleration of the train in which a 50 kg box lying on its floor will remain stationary (Given: Co-efficient of static friction between the box and the train’s floor is 0.3 and g = 10 ms ^-2)

A 12 kg bomb at rest explodes into two pieces of 4 kg and 8 kg. If the momentum of 4 kg piece is 20 Ns, the kinetic energy of the 8 kg piece is

Three bodies a ring (R), a solid cylinder (C) and a solid sphere (S) having same mass and same radius roll down the inclined plane without slipping. They start from rest, if V_R, V_C and V_S are velocities of respective bodies on reaching the bottom of the plane, then

A spring is stretched by applying a load to its free end. The strain produced in the spring is

A pan filled with hot food cools from 94˚C to 86˚C in 2 minutes. When the room temperature is 20˚C. How long will it cool from 74˚C to 66˚C?

Four rods with different radii r and length l are used to connect two heat reservoirs at different temperature. Which one will conduct most heat?

A Carnot engine working between 300 K and 400 K has 800 J of useful work. The amount of heat energy supplied to the engine from the source is

A particle executing SHM has a maximum speed of 0.5 ms^-1 amd maximum acceleration of 1.0 ms^-2. The angular frequency of oscillation is

A source of sound is moving with a velocity of 50 ms^-1 towards a stationary observer. The observer measures the frequency of sound as 500 Hz. The apparent frequency of sound as heard by the observer when source is moving away from him with the same speed is (Speed of sound a room temperature 350 ms^-1)

An electron of mass m, charge e falls through a distance h meter in a uniform electric field E. Then time of fall

Nature of equipotential surface for a point charge is

A particle of mass 1 gm and charge 1 μC is held at rest on a friction-less horizontal surface at distance 1 m from the fixed charge 2 mC. If particle is released, it will be repelled. The speed of the particle when it is at a distance of 10 m from the fixed charge

Mobility of free electrons in a conductor is

Two heating coils of resistances 10 Ω and 20 Ω are connected in parallel and connected to a battery of emf 12 V and internal resistance 1Ω. The power consumed by them are in the ratio

A proton is projected with a uniform velocity ‘v’ along the axis of a current carrying solenoid, then

In the cyclotron, as radius of the circular path of the charged particle increases (ω = angular velocity, v = linear velocity)

The quantity of a charge that will be transferred by a current flow of 20 A over 1 hour 30 minutes period is

A galvanometer coil has a resistance of 50 Ω and the meter shows full scale deflection for a current of 5 mA. This galvanometer is converted into voltmeter of range 0 – 20 V by connecting

χ₁ and χ₂ are susceptibility of a paramagnetic material at temperatures T₁K and T₂K respectively, then

At certain place, the horizontal component of earth’s magnetic field is 3.0 G and the angle dip at that place is 30˚. The magnetic field of earth at that location

The process of super imposing message signal on high frequency carrier wave is called

A long solenoid with 40 turns per cm carries a current of 1 A. The magnetic energy stored per unit volume is _____ J/m³

A wheel with 10 spokes each of length ‘L’ m is rotated with a uniform angular velocity ‘ω’ in a plane normal to the magnetic field ‘B’. the emf induced between the axle and the rim of the wheel

The rms value of current in a 50 Hz AC circuit is 6 A. The average value of AC current over a cycle is

A capacitor of capacitance 10 μF is connected to an AC source and an AC Ammeter. If the source voltage varies as V = 50 √2 sin 100 t, the reading of the ammeter is

In a series L.C.R circuit, the potential drop across L, C and R respectively are 40 V, 120 V and 60 V. then the source voltage is

In a series L.C.R circuit an alternating emf (v) and current (i) are given by the equation v = v₀ sin ωt, i = i₀ sin (ωt + π/3)
The average power discipated in the circuit over a cycle of AC is

Electromagnetic radiation used to sterilize milk is

A plane glass plate is placed over a various coloured letters (violet, green, yellow, red). The letter which appears to raised more

Focal length of a convex lens is 20 cm and its RI is 1.5. It produces as erect, enlarged image if the distance of the object from the lens is

A ray of light suffers a minimum deviation when incident on an equilateral prism of refractive index √2. The angle of incidence is

In Young’s double slit experiment the source in white light. One slit is covered with red filter and the other with blue filter. There shall be

Light of wavelength 600 ηm is incident normally on a slit of width 0.2 mm. The angular width of central maxima in the diffraction pattern is

(measured from minimum to minimum)

The de Broglie wavelength of an electron accelerated to a potential of 400 V is approximately

Total energy of electron in an excited state of hydrogen atom is – 3.4 eV. The kinetic and potential energy of electron in this state

When electron jumps from n = 4 level to n = 1 level, the angular momentum of electron changes by

A radio-active sample of half-life 10 days contains 1000 x nuclei. Number of original nuclei present after 5 days is

A nucleus of mass 20 u emits a γ photon of energy 6 MeV. If the emission assume to occur when nucleus is free and rest, then the nucleus will have kinetic energy nearest to (take 1u = 1.6 × 10^-27 kg)

Constant DC voltage is required from a variable AC voltage. Which of the following is correct order of operation?

In a transistor, the collector current varies by 0.49 mA and emitter current varies by 0.50 mA. Current gain β measured is