True False Charge Q 3 has the largest magnitude of all. True False Q 1 is a nega

Question

True False  Charge Q3 has the largest magnitude of all.
True False  Q1 is a negative charge.
True False  The electric field at i is stronger than at j.
True False  Charge Q2 is the largest negative charge.
True False  The force on a proton at g points to the bottom of the page.
True False  The electric field at k is zero.

Calculate the work required to move a charge of -0.43×10-12C from i to b.

Calculate the size of the electric field at g

Calculate the size of the force on a charge of 8.00×10-19 C at k.
Calculate the size of Q3. The magnitudes of the three charges are in the exact ratios of 1 to 2 to 3.

The potential near a point charge decreases as 1/distance from the charge. The distance at which the potentials have a given value tells the size and sign of the charges involved.

Explanation / Answer

(A)

True, because Q3 has the largest magnitude potential at the farthest distance from itself making it the largest charge

(B)

True, negative potentials surround negative charge.

(C)

True because i is closer to a charge than is j so it has a larger potential

(D)

Falsebecause the first eqipotential ring around Q1 has greater radius

(E)

False because 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.

(F)

False, the potential is not the field. The field describes the change in potential and although the potential is instantaneously zero at k, the field is not

(g)

w= qV

= -0.43E-12*(-3-3)=2.58E-12

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