Homework Help: Physics

Posted by Jon on Wednesday, April 9, 2008 at 12:11pm.

1)Which of the following statements is true about electric forces?

A)electric forces cause objects to only attract each other.
B)electric forces cause objects to only repel each other
C)electric forces cause objects to repel or attract each other
D)electric forces have no effect on each other

the answer is C.

2)A negatively charged balloon sticks to a wooden door. However, an uncharged balloon does not stick to a wooden door. What is the nature of the charge on the wooden door?

A)electrically neutral
B)positively charged
C)conductor
D)lacking protons

I got 3 different answers each time for A-C, but my final answer is A.

Physics - drwls, Wednesday, April 9, 2008 at 12:30pm
1 A)

2. The overall charge of the door may be neutral if it is not electrically grounded, but the door area in contact with the balloon is charged positively in any case, due to polarization and induction. I don't whether to advise you to answer A or B, because the question is too vague about grounding and which part of the door they are referring to.
Physics - Jon, Wednesday, April 9, 2008 at 12:42pm
1) elctric forces do both thats why like charges repel and opposites attract
Physics - drwls, Wednesday, April 9, 2008 at 12:46pm
Yes, I meant to write C. for (1) I was concentrating on answering your second question. My mistake.

Answer this Question

Related Questions

Physics - Which of the following statements is true about electric forces? A. ...
Physics-Please check - Do charged particles always experience equal but opposite...
physics - please check: Conductors can be charged by ___, while insulators ...
IPC - i dont have a book or anything to go look all this stuff up so i really ...
Physics - electrons/protons - If you place a free electron and a free proton in ...
Physics - There is an electric field at a certain point P, where initially there...
physics(electric forces) - how do i figure out if an electric force between 2 ...
physics - An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is ...
Physics - An electron is a subatomic particle (m = 9.11 10-31 kg) that is ...
Physics - An electron is a subatomic particle (m = 9.11 10-31 kg) that is ...

For Further Reading

First Name:
School Subject:
Answer: