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

Assuming that the earth is revolving around the sun in circular orbit of radius 'R', the angular momentum is directly proportional to rⁿ. The value of 'n' is ______.

Rainbow is the phenomenon due to ______.

Detergents in hot water enable grease to be removed from the dishes by ____________.

If the Earth-Sun distance is held constant and the mass of the Sun is doubled, then the period of revolution of the earth around the Sun will change to ____________.

A plano-convex lens is made of material having refractive index 1.5. The radius of curvature of curved surface is 40 cm. The focal length of the lens is ____________ cm.

What will be the work done, when one gram of ice at -10° C is converted into steam at 100°?

Two satellites of masses m and 4m orbit the earth in circular orbits of radii 8r and r respectively. The ratio of their orbital speeds is ____________.

A parallel plate condenser is immersed in an oil of dielectric constant 2. The field between the plates is ______.

The energy spectrum of a black body exhibits a maximum around a wavelength '`lambda`'. The temperature of a black body is now changed such that the energy is maximum around a wavelength 3`lambda`/4. The power radiated by a black body will now increase by a factor of ______.

If a body weighing 40 kg-wt is taken inside the earth to a depth to `1/2` th radius of the earth, then the weight of the body at that point is ____________.

Out of following, the only correct statement about satellites is ____________.

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 capacitor is charged by a battery and energy stored is 'U'. Now the battery is removed and the distance between plates is increased to four times. The energy stored becomes ______.