PHY1220/1520L PreLab – Electric Fields Name:

Modified T / F & fill in the blank (If false, please correct the underlined word)

T/ F Lines of force start from the negative charges and stop at the positive charges.	T / F Equipotential lines bend around conductors but bend toward insulators.
T/ F It is possible for lines of force to cross one another near the conductor.	T / F Near a charged conductor equipotential lines are perpendicular to the surface.
T/ F The lines of force about a conducting object must be drawn perpendicular to the _______ _______ and must stop at the conductor.	Equipotential lines ________ intersect.
	What is the “best” answer to indicate the relative strength of the electric field? a. length of lines of force b. density of equipotential lines c. density of lines of force d. length of equipotential lines
T / F A conducting object has a constant potential and a constant electric field strength throughout.
For the sketch to the right. 2, 4, 5, 6,& 8 Volt equipotential lines are shown the conductors are at 0 and 10 volts Please draw two lines of force 1^st line within the two conductors, 2^nd line below (or outside of) the two conductors. (Hint: I have started it) (Lines of force are perpendicular to equipotential lines and start at + and end at – charges, i.e. high to low. ALSO, if the lines of force are perpendicular to the equipotential lines and the equipotential lines curve, the lines of force must also curve.) Please calculate the electric field strength along 2^nd line of force that you drew above Between the 2V and 4V equipotential lines Δs < 1.0 cm and is measured with a meter stick