Question

5. A conducting rod AB shown in the figure below makes contact with metal rails AD and BC which are 50 cm apart in a uniform magnetic field of density 1.0 Wb/m2 perpendicular to the plane ABCD. The total resistance (assumed constant) of the circuit ABCD is 0.4 Ω and the rod is moved to the left with a velocity of 8m/s. Find: (a) The direction of the e.m.f. induced in the rod /2marks (b)The magnitude the e.m.f. induced in the rod /2marks (c) What is the current following in the circuit? /2marks

Answer 1

ANSWER:-

When a rod of length l moving with a velocity v in a perpendicular magnetic field B , the induced emf =Blv=0.8(50/100)7.5=3V