How is electrical resistance related to electric current?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Work = force × a. work b. energy c. distance d. momentum

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.