Question

Equipotential Lines The lines in the figure below show the equipotential contours in the plane of three point charges, Q1, Q2, and Q3. Note that these are point charges (one is not bigger in size than the others; they're points). That means that the potential goes to infinity as you approach them. We've cut off the contours at plus and minus 7kV. The white space is where the potential is greater or less than that. The values of the equipotential lines are in kv, and we labeled the +1, 0, and-1 kV contours. The positions of the charges are also labeled. 03 01 1 kV Volts 02 1 kv For each statement below, select True" or False" 1 The electric field E at'a' is stronger than at'f | The force on a proton at D' points toward Q2 # 1 Charge Q2 has the largest magnitude of all. Q3 is a positive charge Charge Q1 is the smallest negative charge # The magnitude of the electric field E at 'e' is nonzero.

Answer 1

(1) The electric field at 'a' is stronger than at 'f'

True, 'a' is closer to a charge than 'f' so it has a larger potential.

(2) The force on a proton at 'b' points towards Q₂.

False, a proton will want to move away from the positive charge near the bottom of the page; thus the force would be toward the top.

(3) Charge Q₂ has the largest magnitude of all.

True, Q₂ has the largest magnitude potential at the farthest distance from itself making it the largest charge.

(4) Q₃ is a positive charge.

False,Q₃ is a negative charge. Negative potentials surround negative charge

(5) Charge Q₁ is the smallest negative charge.

True

(6) The magnitude of electric field E at 'e' is nonzero.

True. The field describes the change in potential and although the potential is instantaneously zero at 'e', the field is not. (Sum the vectors from the point charges for proof).