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A molecule of a substance has a permanen...

A molecule of a substance has a permanent electric moment of magnitude `10^(-29)Cm`. A mole of this substnace is polarised by applying a strong electrostatic field of magnitude `10^(6)Vm^(-1)`. The direction of the field is suddenly changed by a angle of `60^(@)`. estimate the heat released by the substance in alighning its dipoles along the new direction of the field. for simplicity, assume 100% polarisation of the sample.

A

`-6J`

B

`-3J`

C

3J

D

6J

Text Solution

Verified by Experts

The correct Answer is:
B
`E = PE`
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A molecule of a substance has a permanent electric dipole moment of magnitude 10^(-29) C m. A mole of this substance is polarized at low temperature by appling a strong elecrostatic field of magnitude 10^(6) V m^(-1) . The direction of the field is suddenly changed by an angle of 60^(@) . Estimate the heat released by the substance in aligning its dipole along the new direction of the field. For simplicity, assume 100% polarisation of sample.

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NARAYNA-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Exercise-2(C.W)
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  3. A molecule of a substance has a permanent electric moment of magnitude...

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  6. Two metal spheres A and B have their capacities in the ratio 3:4 they ...

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  7. A conducting shell S1 having a charge Q is surrounded by an uncharged ...

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  8. A spherical charged conductor has surface charge density sigma.The int...

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  9. Figure shows three spherical and equipotential surface 1,2 and 3 round...

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  10. A half ring of radius r has a linear charge density lambda.The potenti...

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  11. A parallel plate condenser has initially air medium between the plates...

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  12. When a dielectric slab of thickness 4 cm is introduced between the pla...

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  13. The area of the positive plate is A(1) and the area of the negative pl...

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  14. The time in seconds required to produce a P.D at 20 V across a capacit...

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  15. A parallel plate capacitor of capacity 5 mu F and plate separation 6 c...

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  16. The force between the plates of a parallel plate capacitor of capacita...

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  17. Two identical capacitors are connected as show in the figure. A dielec...

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  18. Two identical capacitors 1 and 2 are connected in series to a battery ...

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  19. A capacitor of capacitance C(1)=1 muF withstand a maximum voltage of V...

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  20. Two condensers of capacity C and 2C are connected in parallel and thes...

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