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

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 ______.

There are three needles 'N₁', 'N₂' and 'N₃' made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. When a magnet is brought close to them, then it will ____________.

The materials having negative magnetic susceptibility are ____________.

The magnetic property of magnetic substance is associated with ____________.

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)

The product of magnetic susceptibility (`chi`) and absolute temperature (T) is constant for a ____________.

Above the curie temperature the susceptibility of ferromagnetic substance varies ____________.

A sphere of gold when brought towards a powerful magnet experiences ____________.

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 ______ 

In a biprism experiment, monochromatic light of wavelength (λ) is used. The distance between two coherent sources is kept constant. If the distance between slit and eyepiece (D) is varied as D₁, D₂, D₃, and D₄, the corresponding measured fringe widths are z₁, z₂, z₃, and z₄ then ______ 

In the biprism experiment, a source of monochromatic light is used for a certain distance between slit and eyepiece. When the distance between two virtual sources is changed from d_A to d_B, then the fringe width is changed from Z_A to Z_B. The ratio Z_A to Z_B is ______

Light waves from two coherent sources arrive at two points on a screen with a path difference of zero and λ/2. The ratio of the intensities at the points is ______