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

When the value of acceleration due to gravity 'g' becomes `(g/3)` above the earth's surface at height 'h' then relation between 'h' and 'R' is ______.

R =radius of the earth

The radius of the earth is. 6400 km and that of mars is 3200 km. The mass of the earth is about 10 times the mass of mars. Weight of the object on the earth is 200 N. What will be its weight on the mars?

At a height R above the earth's surface, the gravitational acceleration is ______.

(R = radius of earth, g = acceleration due to gravity on earth's surface.)

Two monoatomic ideal gases A and B of molecular masses 'm₁' and 'm₂' respectively, are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas A to that in gas B is given by ______.

A train blowing the whistle moves with a constant velocity 'V' away from an observer standing on the platform. The ratio of the natural frequency of the whistle 'n' to the apparent frequency is 1.2 : 1. If the train is at rest and the observer moves away from it at the same velocity 'V', the ratio of 'n' to the apparent frequency is ______.

A transverse wave is travelling on a string with velocity 'V'. The extension in the string is 'x'. If the string is extended by 50%, the speed of the wave along the string will be nearly ______.

(Hooke's law is obeyed)

A wire AB is carrying steady current 'I₁' and is kept on the table. Another wire CD carrying current 'I₂' is held parallel and directly above AB at a distance 'r'. When wire CD is left free and it remains suspended at its position, its mass per unit length is (g =acceleration due to gravity) ____________.

A body of mass 10 kg is attached to a wire 0.3 m long. Its breaking stress is 4.8 × 10⁷ N/m². The area of cross-section of the wire is 10^-6m². The maximum angular velocity with which it can be rotated 111 a horizontal circle is ______.

In the case of conical pendulum, if T is the tension in the string and θ is the semivertical angle of cone, then the component of tension which balances the centrifugal force in equilibrium position is ______.

A motorcyclist rides in a horizontal circle about central vertical axis inside a cylindrical chamber of radius 'r'. If the coefficient of friction between the tyres and the inner surface of chamber is 'µ', the minimum speed of motorcyclist to prevent him from skidding is ______.

('g' =acceleration due to gravity)

'n' number of waves are produced on a string in 0.5 seconds. Now the tension in a string is doubled (Keeping radius constant). The number of waves produced in 0.5 seconds for the same harmonic will be ______

The equation of vibration of a stretched string fixed at both ends and vibrating in 5^th harmonic is Y = 3 sin(0.4x) cos(200πt) where 'x' and 'Y' are in cm and t in second. The length of the string is ______

The sequence of harmonics of a pipe open at one end and closed at the other end is 250 Hz and 350 Hz, The resonating length of the air column in its fundamental mode will be ______ 

(velocity of sound in air = 340 m/s) 

The equation of simple harmonic wave is given as y = 5sin `pi/2(100t - x)`, where 'x' and 'y' are in metre and time in second. The period of the wave is ______ 

In biprism experiment, if the 5^th bright band with wavelength 'λ₁' coincides with the 6^th dark band with wavelength 'λ₂' then the ratio `(lambda_2/lambda_1)` is ______ 

In a biprism experiment, the slit separation is 1 mm. Using monochromatic light of wavelength 5000 Å, an interference pattern is obtained on the screen. Where should the screen be moved? so that the change in fringe width is 12.5 x 10⁵ m? 

If two light waves reaching a point produce destructive interference, then the condition of phase difference is ______

In the biprism experiment, the fringe width is 0.4 mm. What is the distance between the 4^th dark band and the 6^th bright band on the same side? 

The graph shows the variation of fringe width (β) versus distance of the screen from the plane of the slits (D) in Young's double-slit experiment Keeping other parameters the same. The wavelength of light used can be calculated as d = distance between the slits ______ 

Waves from two coherent sources of light having an intensity ratio I₁ : I₂ equal to 'x' interfere. Then in the interference pattern obtained on the screen, the value of (I_max - I_min)/(I_max + I_min) is ______