17 Two long straight
parallel conductors carrying steady
currents Ia and Ib and separated by a
distance d Ba is the magnetic field set
up by conductor ‘a’ at conductor ‘b’ 4 8 FORCE BETWEEN TWO PARALLEL
CURRENTS, THE AMPERE
We have learnt that there exists a magnetic field due to a
conductor carrying a current which obeys the Biot-Savart
law