Find the magnitude and direction of electric field in room

Reference no: EM13235986

A small 12.3 g plastic ball is tied to a very light 28.6 cm string that is attached to the vertical wall of a room (see Figure). The wall is charged, creating a horizontal electric field. When the ball has been given an excess charge of -1.11 mC, you observed that it remains suspended, with the string making an angle of 17.4° with the wall.

(a) Identify the sign of the charge on the wall.

(b) Find the magnitude and direction of the electric field in the room.

Reference no: EM13235986

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