If the potential difference applied to a fixed resistance is doubled, the power dissipated by that resistance 1. remains the same 2. doubles 3. halves 4. quadruples

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton