Home
Class 12
PHYSICS
An electric dipoole, when placed at an a...

An electric dipoole, when placed at an angle `30^@` with a uniform electric field of `10^4NC^-1`, expereinces a torque of `9xx10^-26`N m. Calculate the dipole moment and electrostatic potential energy in this position.

Text Solution

Verified by Experts

Angle between the electric dipole and electric field `= theta = 30^@`
`E = 10^4 NC^(-1)`
`tau = 9 xx 10^(-26) Nm`
Dipole moment = P = ?
Electrostatic potential energy of dipole = U = ?
`tau = PE sin theta`
`9 xx 10^(-26) = P xx 10^(4) xx sin 30^@`
`9 xx 10^(-26) = P xx 10^4 xx 1/2`
`P = 18 xx 10^(-30) cm`
Electrostatic P.E. = `U = -PE cos theta`
`U = -18 xx 10^(-30) xx 10^4 xx cos 30^@`
`U = - 18 xx 10^(-26) xx (sqrt3)/2`
`U = -15.59 xx 10^(-26)`
`U = 1.559 xx 10^(-25) J`
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC FIELD

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS (MOST EXPECTED QUESTIONS)|4 Videos

  • ELECTRIC FIELD

    BETTER CHOICE PUBLICATION|Exercise LONG ANSWER TYPE QUESTIONS |9 Videos

  • ELECTRIC CURRENT, RESISTANCE AND E.M.F.

    BETTER CHOICE PUBLICATION|Exercise MOST EXPECTED QUESTIONS |14 Videos

  • ELECTRICAL DEVICES

    BETTER CHOICE PUBLICATION|Exercise (MOST EXPECTED QUESTIONS 2 MARK)|2 Videos

Similar Questions

Explore conceptually related problems

An electric dipole, when held at 30^@ with respect to a uniform electrc field of 10^4 N C^-1 experienes a troque of 9xx10^25N m . Calculate dipole moment of the dipole.

An electric dipole, when held at 30^@ with respect to a uniform electrc field of 3 xx 10^4 N C^-1 experienes a troque of 27xx10^25N m . Calculate dipole moment of the dipole.

An electric dipole of length 2 cm is placed with its axis making an angle of 30^@ to a uniform electric field of 10^5NC^-1 . If it experiences a torque of 10sqrt3Nm , calculate potential energy of the dipole.

An electric diple is placed at angle of 60^@ with an electric field of strength 4xx10^5NC^-1 . It experiences a torque equal to 8sqrt3xx10^-5 Nm. Calculate the charge on the dipole, if dipole is of length 4 cm.

An electric dipole of length 4 cm, when placed with its axis making an angle of 60^@ with a uniform eletric field experiences a torque of 4sqrt3 N m. Calculate the potential energy of the dipole, if the dipole has charges of +- 8 nC .

An electric dipole of length 2 cm is placed with its axis making an angle of 30^@ to a uniform electric field of 10^5NC^-1 . If it experiences a torque of 10sqrt3Nm , calculate the magnitude of the charge on the diple

In the nucleus of _(92) U^(238) , two porotns at a distance of 6xx10^-1 m . Calculate their electrostatic potential energy.