Answer to Question #61359 in Electricity and Magnetism for bebeji

Question

3) A rod of 5.0m length is held horizontally and with its axis in an east-west direction. It is allowed to fall straight down. What is the emf induced in it when its speed is 3.0m/s if the earth's magnetic field is 0:60 10À4 T with a dip angle of 53 degrees?
a) 5:4 10À4 V
b) 3:6 10À3
c) 2:0 10À5
d) 4:2 10À4

4) A rectangular wire loop of width 4.0cm is being pulled out of a magnetic field at a constant speed of 2.0m/s. The magnetic field is 0.30T and is uniform in the region, perpendicular and into the plane of the loop. What is the induced emf in the loop?
a) 0.056V
b) 0.012V
c) 0.024V
d) 0.087V