Physics, 25.01.2020 03:31 oscarmendoza2107

Suppose you want to determine the electric field in a certain region of space. you have a small object of known charge and an instrument that measures the magnitude and direction of the force exerted on the object by the electric field. how would you determine the magnitude and direction of the electric field if the object were (a) positively charged and (b) negatively charged? (a) the object has a charge of +20.0μc and the instrument indicates that the electric force exerted on it is
40.0μn due east. what are the magnitude and direction of the electric field? (b) what are the magnitude and direction of the electric field if the object has a charge of −10.0μc and the instrument indicates that the force is 20.0μn due west?

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Answer from: jeremiahdacalio

2 N/C direction of the force

-2N/C opposite to the direction of the force

Explanation:

E = Electric field

q = Charge

Electrical force is given by

$F=Eq\\\Rightarrow E=\dfrac{F}{q}\\\Rightarrow E=\dfrac{40}{20}\\\Rightarrow E=2\ N/C$

The magnitude of the force is 2 N/C

The force acting on the charge is positive so the direction of the electric field is positive.

$F=Eq\\\Rightarrow E=\dfrac{F}{q}\\\Rightarrow E=\dfrac{20}{-10}\\\Rightarrow E=-2\ N/C$

The magnitude of the force is 2 N/C

The direction of the electric field is negative and opposite to the direction of the force as the charge is negative.

Answer from: Quest

An atom (ours, not carroll's) consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6 nm. * if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Answer from: Quest

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