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

What is the minimum energy required to launch a satellite of mass 'm' from the surface of the earth of mass 'M' and radius 'R' at an altitude 2R?

An aircraft is moving with uniform velocity 150 m/s in the space. If all the forces acting on it are balanced, then it will ______.

If a body weighing 40 kg is taken inside the earth to a depth to radius of the earth, then `1/8`th the weight of the body at that point is ______.

The radius of gyration of a uniform rod of length `l`, about an axis passing through a point `l/4` away from the centre of the rod, and perpendicular to it, is: ____________.

Pick the wrong answer in the context with rainbow.

Two satellites A and B go round a planet P in circular orbits having radii 4R and R respectively. If the speed of the satellite A is 3v, the speed of satellite B is ____________.

Two satellites of masses m₁ and m₂ (m₁ > m₂) are revolving round the earth in circular orbit of radii r₁ and r₂ (r₁ > r₂) respectively. Which of the following statements is true regarding their speeds v₁ and v₂?

Reason of weightlessness in a satellite is ____________.

A geostationary satellite is orbiting the earth at the height of 6R above the surface of earth. R being radius of earth. The time period of another satellite at a height of 2.5 R from the surface of earth is ____________.

Why is a conical projection in front of the hole i.n Fen-y's blackbody?

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 ____________.

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 ____________.