Electricity and Magnetism Answers

A thin non-conducting rod of finite length L has a charge q spread uniformly along it. Show that the magnitude of the electric field at point P a distance y on the perpendicular bisector of the rod is given by: E = q 2π0y 1 (L2 + 4y 2) 1/2

. At what distance along the central axis of a ring of radius R and uniform charge Q is the magnitude of the electric field maximum?

Three charges are placed at the vertices of an equilateral triangle. For what value of Q both sign and magnitude does the total electric field vanish at the center of the triangle? 

 Three charges are fixed to an xy-coordinate system. A charge of 18µC is on y = 3.0m. A charge of −12µC is at the origin. Lastly, a charge of 45µC is on the x-axis at x = 3.0m. Determine the magnitude and direction of the net electrostatic force on the charge at x = 3.0m

A thin glass rod is bent into a semi circle of radius R a charge Q is uniformly distributed along the upper-half and a charge −Q is uniformly distributed along the lower-half. Find the electric field E~ at the center of the semicircle. 

What separation distance do two point charges of +1.0µC and −1.0µC exerts a force of attraction on each that is 440N? 

Identify the statement that is not true of ferromagnetic materials.

The minimum frequency that causes photo electric effect in a metal is 0.5x10¹⁵Hz. What is the approximate value of work function?

What will be resistivity of a metal wire of 2m length and 0.6 mm in diameter, if the resistance of the wire is 50

Is 1 Henry (1H) equivalent to

J.s/A²=J/C . S/A=J×S/C×1/A=J×1/ C/S=1/A=J.S/A²

L=V.sec/A