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An electric dipole of length 20 cm havin...

An electric dipole of length 20 cm having `+-3xx10^(-3)` C charge placed at `60^(@)` with respect to a uniform electric field experiences a torque of magnitude 6 Nm. The potential energy of the dipole is

A

`-2 sqrt3J`

B

`5sqrt3J`

C

`-3sqrt2J`

D

`3sqrt5J`

Text Solution

Verified by Experts

The correct Answer is:
A
`tau = PE sin theta and U = -PE cos theta`
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NARAYNA-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Exercise-2(C.W)
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  2. Three equal charges Q are placed at the three corners of an equilatera...

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  3. An electric dipole of length 20 cm having +-3xx10^(-3) C charge placed...

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  5. Two opposite and equal chrages 4 xx 10^(-8) coulomb when placed 2 xx 1...

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  6. Two thin wire rings each having a radius R are placed at a distance d ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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