Why do we write the unit vectors from the charges to the point
of interest? The negative charge particles will have the field
coming towards it, so I do not understand the directions. For
instance, shouldn't the negative charge on the left of the x-axis
be 
?
Homework Answers
Don't get confused with the field and unit vector directions. They didn't ask for the directions of the field. They asked about the unit vectors from charge to point.
the unit vector is always written as =
The field direction will be taken care of by the -ve sign put for the negative charge when using the charge value in the equation of the field.
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Why do we write the unit vectors from the charges to the point
of interest? The...
Next we move the +Q and +4Q charges to be 3 times as far apart as...
Next we move the +Q and +4Q charges to be 3 times as far apart as they were: +Q 5. Now what is the magnitude of the force on the +40? (b) F/3 (a) F/9 (c) 4F/9 (d) 4F/3 (e) other 6. Which of the arrows is in the direction of the net force on charge B? -1 +1 +1 (e) none of these The picture below shows a centimeters to the left is another particle (labeled A) which has...
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Three identical point charges, each with a charge equal to q, lie in the xy plane. Two of the charges are on the axis...
Three identical point charges, each with a charge equal to q, lie in the xy plane. Two of the charges are on the axis at y =−a and y = +a, and the third charge is on the x axis at x = a. (a) Find the potential as a function of position along the x axis. (Use any variable or symbol stated above along with the following as necessary: k for the Coulomb's constant, and q for the charge.)...
PHY-23102-201910 (UNIVERSITY PHYSICS HOMEWORK SET# 1 DUE DATE: MONDAY, JANUARY 28 Please write neatly and do...
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can you please write every step
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Next we move the +Q and +4Q charges to be 3 times as far apart as they were: +Q 5. Now what is the magnitude of the force on the +40? (b) F/3 (a) F/9 (c) 4F/9 (d) 4F/3 (e) other 6. Which of the arrows is in the direction of the net force on charge B? -1 +1 +1 (e) none of these The picture below shows a centimeters to the left is another particle (labeled A) which has...
PHY-23102-201910 (UNIVERSITY PHYSICS HOMEWORK SET# 1 DUE DATE: MONDAY, JANUARY 28 Please write neatly and do not forget to put your name Problem 1: Consider two vectors: a-ai + 4, and ธิ-5i-bj. Here i is a unit vector (F|-1) along the z-axis and 3 is a unit vector = 1) along the y-axis. (a) Write down the expressions for vectors a +b and a -0 in terms of the unit vectors i and ) (b) Express vector č- a x...
Investigation 2 please
Exploring the electric field of point charges Use PHET interactive CHARGES AND FIELDS. Investigation 1: Electric field due to single charges 1. Use 3 negative -1 nC charges on top of each other to make a point charge 41 = -3.0 nC on the left(ish) side of the grid, and note this point as the origin. 41 X 06 1.0 m 5.0 m 2. Use the field sensor to measure and record the electric field Ex due...
can you please write every step
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