True or false -> Equipotential Contours?
I'll promise to select the best answer if you're right.
Diagram at:
http://bingo1785.webs.com/contour.gif
The diagram shows equipotential contours in the plane of 3 point charges Q1, Q2 and Q3. So I need desperate help with these true of false statements:
a. Charge Q3 has the largest magnitude of all.
b. The force on an electron at g points to the top of the page.
c. The electric field at i is stronger than at j.
d. Q3 is a positive charge.
e. Charge Q2 is the largest negative charge.
f. the electric field at g is zero.
Update:please I really need help with this because the rest of the questions I have left to do are based on this.
Comments
a. Charge Q3 has the largest magnitude of all.
Considering the equipotenttial of 5V, the distance of this curve is greater for Q3.
Hence its charge must be high in magnitude.
b. The force on an electron at g points to the top of the page.
False. The force is parallel to the plane of the page.
c. The electric field at i is stronger than at j.
Not able to decide.
d. Q3 is a positive charge.
True. The potential near to it is more positive than a point farther from it.
e. Charge Q2 is the largest negative charge.
True. Compared to Q1, the potentials are the same for smaller distance from Q2 than Q1.
f. the electric field at g is zero.
False . Potential is zero .Not the field.