27 A battery of e.m.f 8 volts and internal resistance 1 Ohm is connected to a straight
27
A battery of e.m.f 8 volts and internal resistance 1 Ohm is connected
to a straight wire of length 10 cm, of cross sectional area 3 x 10-8 m² and its resis-
tivity 4.5 x 10-6 12. m. calculate the magnetic flux density at a point which lies at
normal distance 20 cm away from the center of the wire. d Lase