MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Physics

A black body has maximum wavelength `lambda_"m"` at temperature 2200 K. wavelength at temperature 3300 K will be ______.

The ratio of energy required to raise a satellite to a height `(2R)/3` above earth's surface to that required to put it into the orbit at the same height is ______.

R = radius of the earth

A satellite of mass 'm', revolving round the earth of radius 'r' has kinetic energy (E). Its angular momentum is ______.

A satellite of mass 'm' is revolving around the earth of mass 'M' in an orbit of radius 'r' with constant angular velocity 'ω'. The angular momentum of the satellite is ______.

(G =gravitational constant)

On mixing highly soluble impurity in water, the surface tension 'T' and angle of contact 'θ', ______.

The value of surface tension of a liquid at critical temperature ______.

In the case of earth, mean radius is 'R', acceleration due to gravity on the surface is 'g', angular speed about its own axis is 'ω'. What will be the radius of the orbit of a geostationary satellite?

A satellite is to revolve round the earth in a circle of radius 9600 km. The speed with which this satellite be projected into an orbit, will be ______.

A satellite is revolving in a circular orbit around the earth has total energy 'E'. Its potential energy in that orbit is ______.

A geostationary satellite is orbiting the earth at a height 6R above the surface of the earth, where R is the radius of the earth. This time period of another satellite at a height (2.5 R) from the surface of the earth is ______.

The period of revolution of a satellite is ______.

Four particles each of mass ‘M’ are placed at corners of a square of side ‘L’. The radius of gyration of the system about an axis perpendicular to the square and passing through its centre is ______.

A flywheel of mass 2 kg has radius of gyration 0.5m. If it makes 10 r.p.s. then its rotational kinetic energy will be ______.

For a projectile thrown into space with a speed v, the horizontal range is `(sqrt3"v"^2)/(2"g")`. The vertical range is `"v"^2/(8"g")`. The angle which the projectile makes with the horizontal initially is ______.

A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel in the next second, will be ______.

A particle is moving with speed v = b`sqrtx` along positive x-axis. Calculate the speed of the particle at time t = τ (assume that the particle is at origin at t = 0).

A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the circumferences of the discs coincide. The centre of mass of the new disc is α/R form the centre of the bigger disc. The value of α is ______.

A satellite is revolving in a circular orbit at a height 'h' above the surface of the earth of radius 'R'. The speed of the satellite in its orbit is one-fourth the escape velocity from the surface of the earth. The relation between 'h' and 'R' is ______.

The ratio of binding energy of a satellite at rest on earth's surface to the binding energy of a satellite of same mass revolving around the earth at a height h above the earth's surface is ______ (R = radius of the earth).

Let M be the mass and L be the length of a thin uniform rod. In first case, axis of rotation is passing through centre and perpendicular to the length of the rod. In second case, axis of rotation is passing through one end and perpendicular to the length of the rod. The ratio of radius of gyration in first case to second case is ______.