An isolated system consists of two particles shown above. particle 1 has charge +q and mass m. particle 2 has charge +2q and mass 2m. the ratio of the magnitude of the electrical force on particle 1 to the magnitude of the electrical force on particle 2 is.

a 1/4
b 1/2
c 1
d 2
e 4

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.