Ask your teacher scientific work is currently underway to determine whether weak oscillating magnetic fields can affect human health. for example, one study found that drivers of trains had a higher incidence of blood cancer than other railway workers, possibly due to long exposure to mechanical devices in the train engine cab. consider a magnetic field of magnitude 0.00100 t, oscillating sinusoidally at 69.5 hz. if the diameter of a red blood cell is 6.20 µm, determine the maximum emf that can be generated around the perimeter of a cell in this field.

Explanation:

Magnetic field

But and f is given as 69.5Hz is 0.00100T

Flux through cell,

Area of cell= and radius of cell is 6.2µm/2=3.1µm converted to mm it's

Change in magnetic flux=

magnitude of induced emf where gives maximum value of induced emf

Since , and R=

=

Rounded off to 2 decimal places, max emf=

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s

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