Electric Fields

What surrounds a positive and negative charge and exerts a force on other charges within the field?

Field lines are drawn with arrowheads to indicate the direction of the force that a small positive charge would experience in an electric field. True or False?

• True

• False

Fill in the blank: Field lines point away from positively charged objects but towards ________ charged objects.

• negatively

• positively

• neutral

• uncharged

What is the minimum number of lines around point charges according to the rules for drawing electric field lines?

• 1

• 2

• 3

• 4

How does electric field strength change as the distance from a point charge increases?

• It increases.

• It decreases.

• It remains constant.

• It fluctuates.

What is the formula for electric field strength in terms of force and charge?

• The formula for electric field strength (E) in terms of force (F) and charge (q) is given by E = F/q.

• The formula for electric field strength (E) in terms of force (F) and charge (q) is given by E = q/F.

• The formula for electric field strength (E) in terms of force (F) and charge (q) is given by E = F*q.

• The formula for electric field strength (E) in terms of force (F) and charge (q) is given by E = F-q.

In a uniform electric field, where do uniform electric fields occur?

• In a uniform electric field, uniform electric fields occur in regions where the electric field strength is constant in magnitude and direction.

• In regions where the electric field strength varies with time.

• In areas where the electric field lines are curved.

• In places where the electric field strength is zero.

True or False: Work done by the electric field on the charged object means the electric field causes the object to move in the direction it would naturally tend to go in the field.

• True

• False

Calculate the work done to move a proton a distance of 10.0 cm towards the negative plate, given V2 = 12.0 V, V1 = 0 V, and d = 0.50 m. Use the equation W = qEd.

• 0.38 eV

• 1.92 eV

• 3.84 eV

• 7.68 eV