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In this class (and in science more generally), approximations and assumptions are very important. Often making assumptions can simplify a problem and focus on certain features that you are interested in. Assumptions are even built into some of the equations we will usé. In this class, we will ask you to think about problems and make assumptions to simplify your problem solving process Of the listed approximations and assumptions below, which MUST be made in order to use this electric field equation: [(E)wec- elect all that are True The coordinate system is set so [(r)] points only in the +x direction The charge q is constant (not charging/discharging) The charge q is a point charge The charge q is fixed in place (not moving over time) Of the listed approximations and assumptions below, which would simplify your calculation of the electric field (but are not necessarily required)? Select all that are True The charge q is a point charge The coordinate system is set so [(r)] points only in the +x direction The charge q is fixed in place (not moving over time) The charge q is constant (not charging/discharging) Submit Answer Incorrect. Tries 3/5 Previous Tries

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Answer #1

(1) Options 2nd, third and fourth are the correct answers.

Because, to apply the expression of electric field, we must assume that charge q is a point charge and constant in nature. Also its distance is not variable with respect to a fixed point.

(2) Option 2nd and third are the correct answers.

Here we are considering for the simplification of the calculation. So, for that, we must assume the location of point in the +x direction and the charge is fixed at its place.

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