Relationship between electricity and magnetism

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?