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

Two satellites of same mass are orbiting round the earth at heights of r₁ and r₂ from the centre of earth. Their potential energies are in the ratio of ______.

A soap bubble of radius 2.0 cm is formed inside another soap bubble of radius 4.0 cm. The radius of another soap bubble which has the same pressure difference as that between the inside of the smaller and outside of large soap bubble, in metres is ______

When tension T is applied to a sonometer wire of length l, it vibrates with the fundamental frequency n. Keeping the experimental setup the same, when the tension is increased by 8 N, the fundamental frequency becomes three times the earlier fundamental frequency n. The initial tension applied to the wire (in newton) was ______.

In Van de Graaff generator potential difference is produced which is in the order of ______

If the flux associated with a coil changes at the rate of 360 webers every 4 minutes, then the induced e.m.f. is ______

A solid cylinder of radius r and mass M rolls down an inclined plane of height h. When it reaches the bottom of the plane, then its rotational kinetic energy is ____________.

(g = acceleration due to gravity)

Van de Graaff generator produces ______.

The angle subtended by the vector A = `5hat"i" + 3hat"j" + 12hat"k"` with the X-axis is ______.

A uniform rod of length '6L' and mass '8 m' is pivoted at its centre 'C'. Two masses 'm' and ' 2m' with speed 2v, v as shown strikes the rod and stick to the rod. Initially the rod is at rest. Due to impact, if it rotates with angular velocity 'w₁' then 'w' will be ________.

A stretched wire of length 260 cm is set into vibrations. It is divided into three segments whose frequencies are in the ratio 2 : 3 : 4. Their lengths must be ______.

When a 12000 joule of work is done on a flywheel, its frequency of rotation increases from 10 Hz to 20 Hz. The moment of inertia of flywheel about its axis of rotation is ______. (π² = 10)

If a particle moves with uniform speed then its tangential acceleration will be ______.

A particle goes round a circular path with uniform speed v. After describing half the circle, what is the change in its centripetal acceleration?

The ratio of angular speed of a hour-hand to the second-hand of a watch is ____________.

Refractive index of a flint glass varies from 1.60 to 1.66 for visible range. Radii of curvature of a thin convex lens are 10 cm and 12 cm. The chromatic aberration between extreme colours is ____________.

The ratio of the angular speed of minute hand and hour hand of a watch is ____________.

A segment of wire vibrates with a fundamental frequency of 450 Hz under a tension of 9 kg weight. The tension at which the fundamental frequency of the same wire becomes 900 Hz is ____________.

A small sphere is attached to a cord and rotates in a vertical circle about a point O. If the average speed of the sphere is increased, the cord is most likely to break at the orientation when the mass is at ____________.

A convex lens of focal length 'f' is placed in contact with a concave lens of the same focal length. The equivalent focal length of the combination is ______.

A sonometer wire is in unison with a tuning fork, when it is stretched by weight w and the corresponding resonating length is L₁· If the weight is reduced to `("w"/4)`, the corresponding resonating length becomes L₂. The ratio `("L"_1/"L"_2)` is ______.