true or false A permanent magnet and a coil of wire carrying a current both produce magnetic fields

True. A permanent magnet like the earth produces its own B field due to movement of the iron core. The earths magnetic field is the reason why we have an atmosphere and it also is the only defense against solar flares. A coil of wire or solenoid that has current have so much moving charge that the motion of the electrical charge can create a significant G b-field

answer: 31, 5556. 952 seconds

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.