Question

A metal bar of height 20cm lying in the plane of the page is moved through a magnetic field at a speed of 0.2m/s towards the right (see the figure below). The field has magnitude 0.5T and points out of the page. The charge separation induced in the bar is the same as would be caused by an EMF:

a)0.004 V upward

b)0.0004 V downward

c)0.02 V upward

d)0.02 V downward

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Answer 1

Given, l= 0. 2m, v=0.2mis, B=0- 5T Magnetic force 19J x B1 VB: - electrostatic force – 19Ě1 E. hoito potential difference + V = El=&B e. H nf = VB l = 0.2 x 0. 5×0.2 = 0.02 . 0.02V downwar a. Correct answer is 6.