Q. Write two properties of magnetic lines of force.

Q. Derive an expression for electric field due electric dipole at a point on an equatorial line.

Q. A resistor is marked with colours red, red, orange and gold. Write the value of its resistance.

Q. By assuming Bohr's postulates derive an expression for radius of $n^{th}$ orbit of electron, revolving round the nucleus of hydrogen atom.

Q. What is interference? Write the condition for path difference in case of constructive and destructive interference.

Q. State Ampere's circuital law.

Q. Mention two limitations of Ohm's law.

Q. Draw the block diagram of generalised communication system.

Q. Derive the expression for refractive index of the material of the prism in terms of angle of the prism and angle of minimum deviation.

Q. Derive an expression for magnetic field strength at any point on the axis of a circular current carrying loop using Biot-Savart's law.

Q. Write three difference between diamagnetic and paramagnetic substances.

Q. Show that voltage leads current by $\frac{\pi }{2}$, when A.C. voltage applied to pure inductance.

Q. Write Coulomb's law in vector form. Also explain the terms.

Q. Derive the expression for capacitance of parallel plate capacitor.

Q. Define S.I. unit of charge.

Q. Mention two applications of infrared radiation.

Q. Name spectral series of hydrogen which lies in the ultraviolet region of electromagnetic spectrum.

Q. What is attenuation in communication system?

Q. Define specific binding energy.

Q. Distinguish between conductor and semiconductor on the basis of band theory of solids.

Q. Write Einstein's equation of photoelectric effect. Give Einsteins explanation of photoelectric effect.

Q. Mention the significance of Lenz's law.

Q. What is the conclusion of Davison and Germer experiment on the nature of electron?

Q. What is photo diode? Mention its one use.

Q. Current in a coil falls from 2.5 A to 0.0 A in 0.1 second inducing an emf of 200V. Calculate the value of self inductance.

Q. What is magnetic declination?

Q. Derive the expression for motional EMF induced in a conductor moving in a uniform magnetic field.

Q. What is equivalent resistance? Derive the expression for effective resistance of two resistors connected in parallel.

Q. Draw the ray diagram of image formation in case of compound microscope.

Q. Explain with circuit diagram how to convert galvanometer into an ammeter.