Q.

In a uniform electric field of 24000 V/m, a dielectric slab of thickness 10 cm is kept such that the electric field lines are perpendicular to the surface of the slab. If the dielectric constant of the material of the slab is K = 6, the intensity of the induced electric field inside the dielectric is

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a

 20000 V/m     

b

28000 V/m

c

zero

d

4000 V/m

answer is C.

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Detailed Solution

Net field in the dielectric=Eg/K=24000/6=

4000V/m. The induced electric field=EQEg/K=240004000=20000V/m

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In a uniform electric field of 24000 V/m, a dielectric slab of thickness 10 cm is kept such that the electric field lines are perpendicular to the surface of the slab. If the dielectric constant of the material of the slab is K = 6, the intensity of the induced electric field inside the dielectric is