Physics Questions
Two masses of 3.4 kg and 2.5 kg are accelerated from an initial speed of 5 m/s and 12 m/s, respectively. The distances traversed by the masses in the 5th second are 104 m and 129 m, respectively. The ratio of their momenta after 10 s is . The value o
The stored charge in the capacitor in steady state of the following circuit is __________ μC.
A 5 mg particle carrying a charge of is moving with velocity of m/s in a region having magnetic field . It moves a distance of α meter along when it completes 5 revolutions. The value of α is __________.
Some distance star is to be observed by some telescope of diameter of objective lens a, at an angular resolution of 3.0 × 10-7 radian. If the wavelength of light from the star reaching the telescope is 500 nm, the minimum diameter of the objective le
A parallel plate capacitor is having separation between plates 0.885 mm. It has a capacitance of 1 μF when the space between the plates is filled with an insulating material of resistivity 1 × 1013 Ωm and resistance 17.7 × 1014 Ω. Relative permittivi
The output Y for the given inputs A and B to the circuit is :
Two radioactive substances A and B of mass numbers 200 and 212 respectively, shows spontaneous α-decay with same Q value of 1 MeV. The ratio of energies of α-rays produced by A and B is __________.
K1 and K2 be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of wavelength λ1 and λ2, respectively. If λ1 = 2 λ2 then the work function of material is given by :
Light ray incident along a vector emerges out along vector as shown in the figure below. The value of C is __________.
Two point charges q₁ = 3μC and q₂ = −4μC are placed at points (2î + 3ĵ + 3k̂) and (î + ĵ + k̂) respectively. Force on charge q₂ is __________ N. (Take 1/4πε₀ = 9 × 109 SI Units)
A 30 cm long solenoid has 10 turns per cm and area of 5 cm2. The current through the solenoid coil varies from 2 A to 4 A is 3.14 s. The e.m.f. induced in the coil is α × 10-5 V. The value α is __________.
A current carrying circular loop of radius 2 cm with unit normal is placed in a magnetic field, . If and current I = 100√2 A, the torque experienced by the loop is __________ Wb.A. (π = 3.14)
A monochromatic source of light operating at 15 kW emits 2.5 × 10²² photons/s. The region of an electromagnetic spectrum to which the emitted electromagnetic radiation belongs to __________. (Take h = 6.6 × 10⁻³⁴ Js and c = 3 × 10⁸ m/s).
The frequency of oscillation of a mass m suspended by spring is v₁. If the length of the spring is cut to half, the same mass oscillates with frequency v₂. The value of v₂/v₁ is __________.
Initial pressure and volume of a monoatomic ideal gas are P and V. The change in internal energy of this gas in adiabatic expansion to volume Vfinal = 27 V is __________ J.
One mole of diatomic gas having rotational modes only is kept is a cylinder with a piston system. The cross-section area of the cylinder is 4 cm². The gas is heated slowly to raise the temperature by 1.2 °C during which the piston moves by 25 mm. The
A spherical liquid drop of radius R acquires terminal velocity v₁ when falls through a gas of viscosity η. Now the drop is broken into 64 identical droplets and each droplet acquires terminal velocity v₂ falling through the same gas. The ratio of ter
A liquid of density 600 kg/m³ flowing steadily in a tube of varying cross-section. The cross-section at a point A is 1.0 cm² and that at B is 20 mm². Both the points A and B are in same horizontal plane, the speed of the liquid at A is 10 cm/s. The d
A solid cylinder having radius R and length L is slipping on a rough horizontal plane. At time t = 0 the cylinder has a translational velocity v₀ = 49 m/s, perpendicular to its axis and a rotational velocity v₀/4R about the centre. The time taken by
Two identical bodies, projected with the same speed at two different angles cover the same horizontal range R. If the time of flight of these bodies are 5 s and 10 s, respectively, then the value of R is _______ m. (Take g = 10 m/s²)
A thin biconvex lens is prepared from the glass (μ = 1.5) both curved surfaces of which have equal radii of 20 cm each. Left side surface of the lens is silvered from outside to make it reflecting. To have the position of image and object at the same
A gas balloon is going up with a constant velocity of 10 m/s. When this balloon reached a height of 75 m, a stone is dropped from it and balloon keeps moving up with the same velocity. The height of the balloon when the stone hits the ground is _____
A car moving with a speed of 54 km/h takes a turn of radius 20 m. A simple pendulum is suspended from the ceiling of the car. Determine the angle made by the string of the pendulum with the vertical during the turning. (Take g = 10 m/s²)
Consider the equation Where H = magnetic field; E = electric field; ε = permittivity, x = distance, t = time. The values of p, q, r and s respectively are :
A new unit (α) of length is chosen such that it is equal to the speed of light in vacuum. What is the distance between Venus and Earth in terms of α units if light takes 6 min. 40 s to cover this distance?