Chapter $21$ HW

Question $1$:

Two point charges are separated by $25\mathrm{.}0$cm $($see the $($Figure $1)).$ Part E: What would be the magnitude of the electric force this combination of charges would produce on a proton at A$?$ Express in Newtons.

Question $2$:

A small $12\mathrm{.}1$ g plastic ball is tied to a very light $29\mathrm{.}1$ cm string that is attached to the vertical wall of a room. $($See the figure $($Figure $1).)$ A uniform horizontal electric field exists in this room. When the ball has been given an excess charge of $-1\mathrm{.}30$ C $,$ you observe that it remains suspended, with the string making an angle of $17\mathrm{.}4$ degrees with the wall.

Part A: Find the magnitude of the electric field in the room.

Part B: Find the direction of the electric field in the room.

A small $12\mathrm{.}1$ g plastic ball is tied to a very light $29\mathrm{.}1$ cm string that is attached to the vertical wall of a room. $($See the figure $($Figure $1).)$ A uniform horizontal electric field exists in this room. When the ball has been given an excess charge of $\backslash (-1\mathrm{.}30\backslash$mu $\backslash$mathrm$\{$C$\}\backslash ),$ you observe that it remains suspended, with the string making an angle of $\backslash (17\mathrm{.}4^\{\backslash$circ$\}\backslash )$ with the wall.

Figure Part A

Find the magnitude of the electric field in the room.

Express your answer in newtons per coulomb.

Incorrect; Try Again; $8$ attempts remaining

Part B

Find the direction of the electric field in the room.

to the right

to the left