Calculate the force experienced by a positive test charge of 8.1 × 10-9 coulombs if the electric field strength is 9.4 × 107 newtons/coulomb.
a.
1.5 × 10-1 newtons
b.
9.4 × 10-7 newtons
c.
7.6 × 10-1 newtons
d.
8.7 × 10-1 newtons

C.  

7.6 × 10-1 newtons

Explanation:

The electrostatic force experienced by a charge is given by

where

q is the magnitude of the charge

E is the magnitude of the electric field

In this problem, we have

is the charge

is the electric field

Substituting into the formula, we find

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.