In the region shown in the diagram below there is an electric ?eld due to a poin

Question

In the region shown in the diagram below there is an electric ?eld due to a point charge located at the center of the circle. The arrows indicate the magnitude and direction of the electric ?eld at the locations shown.

Question 1:

What is the sign of the source charge? Your

answer should either be a plus sign or a minus

sign.

Answer: It should be negative.

Question 2:

Now, a particle whose charge is ?7 ? 10 ^?9Cis placed at location A.

Which arrow best indicates the direction of

the electric force on this charge? Enter ?j? if

the force is the zero vector.

Answer: B

So far I am understanding the problem. However, the next three questions Is where the trouble starts.

Question 3:

Question 4:

What is E?y?

Question 5:

These are the three problems which are not making sense to me. Any help will be appreciated.

Explanation / Answer

electric field given(-7000N/C,-7000N/C,0)
Ex unit vector=-7000/7000^2+7000^2 =-1/2

Ey unit vector=-7000/7000^2+7000^2 =-1/2

Electic force=qEx i + qEy j =-7*10^-9 *(-7000)i-7*10^-9 *(-7000)j=4.9*10^-5 i + 4.9*10^-5 j

Fx=4.9*10^-5 N

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects