Question

A 4.00-cm slide wire moves outward with a speed of 100 m/s in a 1.00 T magnetic field. See Figure 19.

At the instant that the circuit forms a 4.00 cm

Answer 1

induced emf is defiend as the rate of change of magnetic flux

in mathematical form,

induced emf e = NAdB/dt    or NABW

where A = area

N = no. of tunrs

W = angular frequency

dB/dt = rate of change of amgnetic flux

induced current i = e/R

Where R = resisatnce

so here we apply

#A: induced emf e = lvB    = 0.04 * 100 * 1    =   4 volts

induced current i = emf/R

i = 4/0.010

i = 400 AMps

PD = emf e = 4 Volts