Question

Of the listed approximations and assumptions below, which MUST be made in order to use this electric field equation: E Select all that are True. The coordinate system is set so points only in the +x direction. The charge q is a point charge O The charge q is fixed in place (not moving over time) O The charge q is constant (not charging/discharging) 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 constant (not charging/discharging) The coordinate system is set so points only in the +x direction O The charge q is a point charge The charge q is fixed in place (not moving over time)

Answer 1

a) In order to use the electric field equation: $\bar E = \dfrac{k*q}{r^2} \bar r$

# The charge is a point charge

# The charge q is fixed in place (not moving over time)

# The charge q is constant (not discharging / charging).

b)

Actually these all are the good approximations which could make our calculation of the electric field.

But in case of 'Not Necessarily Required'

# The coordinate system is set so $\bar r$ Points only in the +x direction.

#The charge q is point charge.

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