Hello,(adsbygoogle = window.adsbygoogle || []).push({});

I have some missed test questions that I still don't understand. Can anyone please explain these.

1)

Two chrged objects atrract each other with a force F. What happens to the F between them if one is doubled, the other is tripled and the seperation distance between their centers is reduced to 1/4 its original value? the force is now equal to

16F

3/8F

96F

2)What is the charge on 1kg of protons?

1C

9.6 x 10^7 C

6x10^26C

3)A copper penny has mass 3g. A total of 4x10^12 electrons are transfored from one nuetral penny to another. if the electrostatic force of attraction between the pennies is equal to the weight of a penny, what is the seperation between them?

31cm

35cm

37cm

4) How can a negatively charged rod charge an electroscope negatively? Is it by conduction because its not induction.

can anyone gimme their answer and how they derived it since I missed it I provided the remaining test answers to help you choose from. Please any help is appreciated as always.

Thanks!

Dx

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Electric charge and fields

**Physics Forums | Science Articles, Homework Help, Discussion**