Question

For Q3 - Q4: Two charges, q and Q, are placed near each other as shown. Suppose it is known that q is positive, and that the net electric field at point P is zero. q P R Q3. What can you say about charge Q? (a) Q is positive and larger in magnitude than q. (b) Q is negative and larger in magnitude than q. (c) Q is positive and smaller in magnitude than q. (d) Q is negative and smaller in magnitude than q. Explain your answer. Q4. Suppose instead that the net electric field is zero at point R. What can you say about charge Q? (a) Q is positive and larger in magnitude than q. (b) Q is negative and larger in magnitude than q. (c) Q is positive and smaller in magnitude than q. (d) Q is negative and smaller in magnitude than q. Explain your answer.

          For Q3 - Q4: Two charges, q and Q, are placed near each other as shown. Suppose it is
known that q is positive, and that the net electric field at point P is zero.
q
P
R
Q3. What can you say about charge Q?
(a) Q is positive and larger in magnitude than q.
(b) Q is negative and larger in magnitude than q.
(c) Q is positive and smaller in magnitude than q.
(d) Q is negative and smaller in magnitude than q.
Explain your answer.
Q4. Suppose instead that the net electric field is zero at point R. What can you say
about charge Q?
(a) Q is positive and larger in magnitude than q.
(b) Q is negative and larger in magnitude than q.
(c) Q is positive and smaller in magnitude than q.
(d) Q is negative and smaller in magnitude than q.
Explain your answer.

For Q3 - Q4: Two charges, q and Q, are placed near each other as shown. Suppose it is
known that q is positive, and that the net electric field at point P is zero.
q
P
R
Q3. What can you say about charge Q?
(a) Q is positive and larger in magnitude than q.
(b) Q is negative and larger in magnitude than q.
(c) Q is positive and smaller in magnitude than q.
(d) Q is negative and smaller in magnitude than q.
Explain your answer.
Q4. Suppose instead that the net electric field is zero at point R. What can you say
about charge Q?
(a) Q is positive and larger in magnitude than q.
(b) Q is negative and larger in magnitude than q.
(c) Q is positive and smaller in magnitude than q.
(d) Q is negative and smaller in magnitude than q.
Explain your answer.

Added by Tara C.

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