Question

which statement correctly describes the direction of electric field lines? they point away from positive charges and toward negative charges. they point toward positive charges and away from negative charges. they form circles that connect positive and negative charges. they are parallel to the direction of the charges movement.

Explanation:

Electric field lines are a visual representation of the electric field. By convention, electric field lines start from positive charges (as positive charges are considered sources of the electric field) and end at negative charges (as negative charges are sinks). This convention helps in understanding the direction of the force that would act on a positive test charge placed in the field. For example, a positive test charge near a positive source charge would experience a repulsive force (hence the field line direction away from the positive charge), and near a negative charge, it would experience an attractive force (field line direction towards the negative charge). The other options are incorrect:

• Field lines do not point toward positive charges (that would be against the convention as positive charges repel positive test charges).
• They do not form circles connecting positive and negative charges (field lines are straight or curved lines starting and ending on charges, not circular loops in this context).
• They are not necessarily parallel to the direction of a charge’s movement (charge movement depends on various factors like initial velocity, other forces, etc., while field lines represent the electric field direction at a point).

Answer:

They point away from positive charges and toward negative charges.