It requires 50 μJ of work to carry a 2C charge from point R to S. What is the potential difference between these points?

An infinite number of charges each equal to q are placed along X-axis at x = 1, x = 2, x = 3, x = 4, x = 8 and soon. Find the electric field at the point x = 0 due to this set up of charges.

Explain the variation of resistivity of conductor and semiconductor with change in temperature.

Using the concept of drift velocity of charge carries in a conductor, deduce the relationship between circuit density and resistivity of the conductor?

An aluminium wire of diameter 0.24 cm is connected in series to a copper wire of diameter 0.16 cm. The wires carry an electric current of 10 A. Determine the current density in aluminium wire.

Describe the motion of a charged particle in a uniform magnetic field.

Calculate the force per unit length on a long straight wire carrying current of 4A due to a parallel wire carrying 6A current if the distance between the wires is 3cm.

A circular coil of radius 10cm, 500 turns and resistance 2000 is placed with its plane perpendicular to the horizontal component of earth's magnetic field. It is rotated about its vertical diameter through 180⁰ in 0.25s. Estimate the magnitudes of the emf and current induced in the coil. (BH = 3 x 10^-5T)

An Im long solenoid with a diameter of 2cm and 2000 turns has a secondary coil of 1000 turn could closely near its mid-point what will be the mutual inductance between the two coils?

The magnetic field amplitude of an Electromagnetic wave is 1.6 x 10^-7 T. If the frequency is 30 MHz. determine electric field, any velocity K and λ.

The critical angle for a given piece of glass is 45°. Calculate the polarising angle for it. Also calculate the angle of refraction when light is incident on this glass at an angle of incident equal to i_p.

An object is placed 40 cm from a convex lens of focal length 30 cm, If a concave lens of focal length 50 cm is introduced between the convex lens and the image formed such that it is 20 cm from the convex lens, find the change in the position of the image.

Two lenses of power +15 and - 5D are in contact with each otherforming a combination lens.
(a) What is the focal length of this combination?
(b) An object of size 3 cm is placed at 30 cm from this combination of lenses. Calculate the position and size of the image formed.

A convex lens, of focal length 20 cm, has a point object placed on its principal axis at distance of 40 cm from it. A plane mirror is placed 30 cm behind the convex lens. Locate the position of image formed by this combination.

Explain the production of x-rays.

The wavelength of light from the spectral emission line of sodium is 589 nm. Find the kinetic energy at which
(a) an electron and
(b) a neutron would have the same Broglie wavelength.

Monochromatic light of frequency 6 x 10¹⁴ Hz is produced by a laser. The power emitted is 2.0 x 10^-3 W. How many photons per second on an average are emitted by the source?

The two lines A and B in figure show the plot of de Broglie wavelength λ as a function of \(\frac{1}{\sqrt V}\) for two particles having the same charge. V is the accelerating potential. Which of the two represents the particle of heavier mass?

An electron and a proton, each have de Broglie wavelength of 1.00 nm.
(a) Find the ratio of their momenta.
(b) Compare the kinetic energy of the proton with that of the electron.

Write the application of alpha decay in smoke detectors.

A nucleus of UX₁ has a half-life of 24.1 days. How long a sample of UX₁ will take to change 90% of it to UX₂?

Explain and classify transistor as an oscillator.

What is meant by satellite communication? Give its applications.