Question

A point charge is placed 3 m from a 4 uC charge. What is the strength of the electric field on the point charge at this

distance? (Round to the nearest whole number.)

Answer 1

`4,000N/C`

Step-by-step explanation:

the information we have is:

distance:
`r=3m`

charge:
`q= 4\mu C`

since the prefix
`\mu` is equal to
`1x10^(-6)`

the charge is:
`q=4x10^(-6)C`

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To calculate the strength of the electric field we use the following formula:

`E=(kq)/(r^2)`

where
`q` is the charge,
`r` is the distance and
`k` is Coulomb's constant

`k=9x10^9Nm^2/C^2`

substituting all the known values into the formula:

`E=((9x10^9Nm^2/C^2)(4x10^(-6)C))/((3m)^2) \\E=(36,000Nm^2/C)/(9m^2) \\E=4,00N/C`

The strength of the electric field on the point charge at the distance of 3m is 4,000 N/C.

Answer 2

Answer:4000v/m

Step-by-step explanation: