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

A step-up transformer has 300 turns of primary winding and 450 turns of secondary winding. A primary is connected to 150 V and the current flowing through it is 9A. The current and voltage in the secondary are 

Two radioactive materials X₁ and X₂ have decay constants 10λ and λ respectively. If initially, they have the same number of nuclei, then the ratio of the number of nuclei of X₁ to that of X₂ will belie after a time.

A current I flows along the length of an infinitely long, straight, and thin-walled pipe. Then ______

In case of a liquid which does not wet a solid surface, the force of adhesion ______

Ampere's law is analogous to ______

A bullet of mass m moving with velocity v is fired into a wooden block of mass M, If the bullet remains embedded in the block, the final velocity of the system is ____________.

A radioactive element disintegrates for an interval of time equal to its mean lifetime. The fraction that has disintegrated is ______

In an LC circuit ______

A stone of mass 1 kg is tied to a string 2m long and it's rotated at constant speed of 40 ms- 1 in a vertical circle. The ratio of the tension at the top and the bottom is ______.
[Take g = 10 ms^-2]

Which one of the following nuclei has shorter meant life?

Above the resonance frequency, ____________.

The output power in step-up transformer used in practice is ______.

A molecule of water on the surface experiences a net ______.

A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V. If the ratio of output to input power is 0.8, then the current drawn by primary winding is ______.

Two masses M₁ and M₂ are accelerated uniformly on frictionless surface as shown in the figure. The ratio of the tensions `"T"_1/"T"_2` is ______.

'Half-life' of a radioactive substance accounts for ______.

Smaller drops of a liquid are generally more spherical than larger drops, because ____________.

In a sphere of influence, the liquid molecule at its centre is ______.

If bullet of mass 'm₁' is fired from a gun of mass 'm₂' with a speed of 'V₁', then the recoil velocity of gun is ______.

A uniform current is flowing along the length of an infinite, straight, thin, hollow cylinder of radius 'R'. The magnetic field 'B' produced at a perpendicular distance 'd' from the axis of the cylinder is plotted in a graph. Which of the following figures looks like the plot?