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An electric dipole of length 2cm is pla...

An electric dipole of length `2cm` is placed with its axis making an angle `30^(@)` to a uniform electric field `10^(5)N/C` .If it experiences a torque of `10sqrt(3)`Nm ,then potential energy of the dipole ..

A

`-10J`

B

`-20J`

C

`-30J`

D

`-40J`

Text Solution

Verified by Experts

The correct Answer is:
C
`tau=PE sin theta and U=-PE cos theta`
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NARAYNA-ELECTROSTATIC POTENTIAL AND CAPACITANCE-EXERCISE -2 (H.W)
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  4. Two charges +3.2xx10^(-19)C and -3.2xx10^(-19)C placed 2.4A^(0) apart ...

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  5. Two spherical conductors A and B of radii 1mm and 2mm are separated by...

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  6. Two concentric spherical conducting shells of radii R and 2R carry cha...

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  7. Work performed when a point charge 2xx10^(-8)C is transformed from inf...

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  8. A conducting sphere A of radius a, with a charge Q, is placed concentr...

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  9. Two identical thin ring, each of radius R meters, are coaxially placed...

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  10. The capacity of a condenser A is 10muF and it is charged to a battery ...

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  11. A parallel plate capacitor has the space between its plates filled by ...

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  12. A capacitor of capacitance 10 mu F is charged to a potential 50 V with...

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  13. A parallel plate capacitor with plate area 'A' and separation 'd' is f...

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  14. A and B are two condensers of capacities 2muF and 4muF. They are charg...

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  15. Force of attraction between the plates of a parallel plate capacitor i...

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  16. Seven capacitors each of capacitance 2muF are to be connected in a con...

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  17. The equivalent capacitance between 'A' and 'B' in the adjoining figure...

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  18. If metal section of shape H is inserted in between two parallel plates...

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  19. The equivalent capacitance C(AB) of the circuit shown in the figure ...

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  20. In the figure shown the effective capacity across P & Q is ( the area...

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