A small plastic ball with a mass of 7.00 10-3 kg and with a charge of +0.155 µC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of each plate is 0.0135 m2. What is the magnitude of the charge on each plate?

the magnitude of the charge Q on each plate is

Explanation:

Given that :

mass (m) =

charge (q) = +0.155 µC =

angle

Area A on each plate = 0.0135 m²

From the diagram below;

   ----- equation (1)

Also by using Gauss Law ;

    ----- equation (2)

Combination equation 1 and 2 together ; we have

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.