(a) Flux is given as
= BA
here area is changing , so we can write it as
= BA
(b) E = d / dt
E = BA / dt
Here
A / dt can be written as length * velocity
so,
EMF = Blv
EMF = 0.08 * 1.5 * 3
EMF = 0.36 V
(c) F = ILB
I = EMF / R
I = 0.36 / 0.4 = 0.9 A
so,
F = 0.9 * 1.5 * 0.08
F = 0.108 N
7. The rolling axe, 1.80 m long, in pushed along hotno rais at oithe railis 3.00...
(a) (4 marks) Two long, parallel, straight wires spaced d = 0.06 m apart carry currents 4 A and 7 A in opposite directions. Copy the diagram at right showing the two wires and indicating the direction of the currents in each. (i) Draw a vector indicating the direction of the magnetic field caused by the first wire at the position of the second wire. (ii) Indicate the direction of the force experienced by the second wire due to this...