Write down formula for surface charge density. A charge Q is distributed over two concentric hollow

What are the conditions for the Minimum deviation by prism? one face (Ac) of a prism of refracting

The temperature of equal masses of three different liquids A, B and Care 12°C, 19°C and 28°C resp..

Calculate the heat required to convert 3 kg of ice at 12°C kept in a calorimeter to steam at 100°c..

A mercury thermometer has a bulb of volume 0.300 cm and a stem of diameter 0.0100 cm. Find the ..

A steel sphere is to be passed through a circular brass ring. At 20 °C the outer diameter of...

A liquid drop of diameter D breaks up into 27 tiny drops find the resulting change in energy...

The volume of a thin brass vessel and that of a solid brass cube are both equal to 1 litre exactly..

A steel cylinder of diameter 'exactly' 1 cm at 30°C is to be fitted into a hole in a steel plate. ..

An iron scale is calibrated at 0°C. The length of a zinc rod is measured to be 100 cm by the scale..

The brass scale of a barometer gives correct reading at 0°C. The barometer reads 75 cm at 27 C. ..

Show that farad/meter=coulomb ^2/(newton×meter^w)

Energy of electrons in the nth orbit of hydrogen atom is -13.6 /n^2 ev. Draw energy level diagram..

A particle, having a charge of 5 mu*C is initially at rest at the point x = 30 cm on the X-axis...

Using monochromatic light of wavelength λ., in Young's double between the two waves, the inte..

What do you understand by polarized light when a third polaroid is rotated between two crossed..

A convex lens of focal length f is placed somewhere between object and screen. The distance bet..

Two charged conducting spheres of radii a and b are connected to each other by a wire. Find the...

The surface temperature of a hot body is 1227°C. Find the wavelength at which it radiates maximum...

Calculate the temperature (in K) at which a perfect black body radiates energy at the rate .....

Luminosity of the Rigel star in the Orion constellation is 17,000 times that of our sun. If the....

Two identical dipoles are arranged in x-y plane as shown in the figure.Find the magnitude and the

A simple pendulum consists of a small sphere of mass m suspended by a thread of length l. Th

A parallel light beam of wavelength 6000 Å passes through a slit 0.2 mm wide and forms a diffraction

A Fraunhofer diffraction pattern due to a single slit of width 0.2 mm is being obtained on a screen

Light of wavelength 5900 × 10^-10 m falls normally on a slit of width 11.8 x 10 ^-5cm and the resu

A parallel beam of light of wavelength 600 nm is incident normally on a narrow slit of width 3mm

A slit of width e is illuminated by red light of wavelength 6200 Å. For what value of e will be the

A double slit is illuminated by light of wavelength 6000 Å. The slits are 0.1 cm apart and the

Two slits are 1.0 mm apart and placed at a distance of 1.0 m from a screen. Find fringe-width when

Two coherent light sources whose intensity ratio is 25: 16 produce interference fringes.

Two waves of amplitudes 3 mm and 4 mm are travelling in a medium in the same direction.

In Young's experiment, the fringe-width with light of lambda = 6000 Å is 2.0 mm. What will be the

The work function is 4.5 ev

The work function of sodium is 2.28 electron volt

An electromagnetic radiation of frequency 3 × 10^15 Hz falls on a photoelectric surface whose work

In an experiment of photoelectric effect, the graph between the maximum kinetic energy E_{k} of the

Light of wavelength 5000 Å from a 2-W bulb is falling on a surface. If the absorptive power of the

Find the number of photons of wavelength lambda₁ = 5.0 x 10^5 cm whose total energy is equal to the

What is the energy associated in joule with a photon of wavelength 4000 Angustom.

An astronomical telescope has an objective of focal length 200 cm and an eyepiece of focal length

Water is flowing through a horizontal pipe of non-uniform cross-section. The speed of water is 30

Water is flowing through a cylindrical pipe of cross-sectional area 0.09m² at a speed of

Velocity of flow of water in a horizontal pipe is 10 m * s ^ - 1 Find the velocity-head of wa

A metal cube of side 10 cm is subjected to a shearing stress of 10 ^ 4 * N / (m ^ 2) Calculate t

1m ^ 3 of water is taken from the surface of a lake to a depth of 200 m inside the lake. What will

A cube is subjected to pressure of 5 * 10 ^ 5 * N / (m ^ 2) Each side of the cube is shortened by 1%

A brass rod of length 0.2 m and area of cross-section 2c * m ^ 2 is compressed by a force of 5 kg-wt

A wire of length 1.0 m has area of cross-section 0.1c * m ^ 2 The Young's modulus of material of the

An astronomical telescope set for normal adjustmen has a magnifying power 10. If the focal length

An astronomical telescope consists of two convex lenses having focal length 80 cm and 4 cm.

On seeing with unaided eye, the visual angle of moon at the eye is 0.6°. The focal lengths of th

The distance between the objective of a compound microscope and the real image formed by it is

If a stress of kg + - w * l / m * m ^ 2 is applied on a wire, then what will be the percentage

For steel the breaking stress is 8 * 10 ^ 6 * N * m ^ - 2 and the density is 8 * 10 ^ 3 kg m ^ - 3

A metallic wire has a radius of 0.2 mm. How much force is required to have an

A weight of 20 kg is suspended from a wite. The area of cross-section of the wite is 1m * m ^ 2 and

A compound microscope has an objective of focal length 1 cm and an eyepiece a focal length 3 cm

A compound microscope has a magnifying power of 30. The focal length of its eye-piece is 5 cm

The magnification by the objective of a compound microscope is 8. If the magnifying power of the m