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## Homework Statement

## Homework Equations

F = E x q

## The Attempt at a Solution

I was told the direction of the E field should be pointing upwards but I have no clue as to why. I found the Force = 0.0012 N but not the direction.

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- #1

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F = E x q

I was told the direction of the E field should be pointing upwards but I have no clue as to why. I found the Force = 0.0012 N but not the direction.

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So to find the electric field direction we only have to look at the charge of the particle?

Hence the electric field is pointing towards the particle and not flowing in a constant direction?

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- #5

ehild

Homework Helper

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Look at the equation F=E*q. F and E are vectors, e is a scalar, it is negative now. What happens to the direction of a vector if you multiply it with a negative scalar? If the result, F, points downward, what is the direction of E?## Homework Statement

View attachment 87949

## Homework Equations

F = E x q

## The Attempt at a Solution

I was told the direction of the E field should be pointing upwards but I have no clue as to why. I found the Force = 0.0012 N but not the direction.

- #6

ehild

Homework Helper

- 15,543

- 1,913

A charge does not feel its own electric field. When we say that a charged particle is placed in an electric field E, and a force acts on it, the force felt by the charge is F=qE, parallel or antiparallel with E, depending on the sign of the charge.So to find the electric field direction we only have to look at the charge of the particle?

Hence the electric field is pointing towards the particle and not flowing in a constant direction?

The net field will be modified by the added charge, but usually it is assumed that the charge is small and it disturbs the original field only very near to itself.

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