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

In Balmer series, wavelength of first line is 'λ₁' and in Brackett series wavelength of first line is 'λ₂' then `lambda_1/lambda_2` is ______.

An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is ( c being velocity of light) ______.

The oscillation in L.C. circuit is produced due to ____________.

In a Young's double-slit experiment, the intensity at a point where the path difference is `lambda/3` (`lambda` being the wavelength of the light used) is I. If I₀ denotes the maximum intensity, then `"I"/"I"_0` is equal to ______.

The velocity of sound waves in diatomic gas at 30° C ____________.

In Young's experiment, the distance between the slits is doubled and the distance between the slit and screen is reduced to half, then the fringe width ____________.

A thin wire of 99 cm is fixed at both ends as shown in figure. The wire is kept under a tension and is divided into three segments of lengths l₁, l₂, and l₃ as shown in figure. When the wire is made to vibrate respectively with their fundamental frequencies in the ratio 1:2:3. Then the lengths l₁, l₂, and l₃ of the segments respectively are (in cm).

In a double slit experiment, the two slits are 2 mm apart and the screen is placed 1 m away. A monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten maxima of double slit within the central maxima of single slit pattern?

In a biprism experiment, D = 1 m, `lambda` = 6000 Å. When a convex lens is interposed between the biprism ru1d the eyepiece, then the distance between the images of the slits given by the Jens at two positions are 1.5 mm and 6.0 mm. The fringe width will be ______.

Magnetic dipole moment `vec"m"` of the coil, placed in uniform magnetic field of induction `vec"B"` does not depend on ____________.

Two strings A and B of same material are stretched by same tension. The radius of the string A is double the radius of string B. Transverse wave travels on string A with speed 'V_A' and on string B with speed 'V_B'. The ratio `"V"_"A"/"V"_"B"` is ______.

Laplace's correction in the formula for the speed of sound given by Newton was required because sound waves ______.

A current loop in a magnetic field ____________.

Electrical oscillations of desired frequency can be obtained by ______.

A uniform rope of mass 6 kg hangs vertically from a rigid support. A block of mass 2 kg is attached to the free end of the rope. A transverse pulse of wavelength 0.06 m is produced at the lower end of the rope. The wavelength of the pulse, when it reaches the top is ______. (in m) 

In the figure below, D and E respectively represent

What is the momentum of a photon having frequency 1.5 x 10¹³ Hz?

The magnetic moment of a square coil having 10 turns, each side measuring 2 cm and carrying a current of unit ampere is ____________.

An air column, closed at one end and open at the other resonates with a tuning fork of frequency v, when its length is 45 cm, 99 cm and at two other lengths in between these values. The wavelength of sound in air column is ____________.

Assertion: The change in air pressure affects the speed of sound.

Reason: The speed of sound in gases is proportional to the square of pressure.