Write Biot-Savart law in vector form and mention the direction of magnetic field. Which term in the law works as a vector source and produces the magnetic field? Mention one similarity and one dissimilarity, between Biot-Savart law for magnetic field and Coulomb's law for electrostatic field.

Illustrate the Biot-Savart law.

Write down the values of sin (450)^@

Write down the values of sin 570^@ .

Deduce the expression of Biot-Savart's law of a finite conductor carrying current I.

Write down the Stefan's law and Stefan Boltzaman law.

State Newton's law of gravitation in vector form.

A charge particle q is projected in a uniform magnetic field of flux density B at an angle theta with the direction of flux density. Write down the expression of magnetic force acting on the charge particle in vector form.

Write down the truth table on NAND gate.

Write down the value of cos 15^@ .