Acylindrical tungsten filament 16.0 cm long with a diameter of 1.00 mm is to be used in a machine for which the temperature will range from room temperature (20⁰ c) up to 120⁰ c. it will carry a current of 12.5 a at all temperatures ( resistivity of tungsten at 20⁰ c is 5.25×10−8ωm, the temperature coefficient of resistivity at 20⁰ c is 0.0045 ⁰ c-1)

a) what will be the maximum electric field in this filament? express your answer using two significant figures.
b) what will be its resistance with that field? express your answer using two significant figures.
c) what will be the maximum potential drop over the full length of the filament? express your answer using two significant figures.

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.