SATHEE: Electrostatics Question 311

Electrostatics Question 311

Question: An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively [CBSE PMT 2004]

Options:

A) $2 q \cdot E$ and minimum

B) $q \cdot E$ and $p \cdot E$

C) Zero and minimum

D) $q \cdot E$ and maximum

Show Answer

Answer:

Correct Answer: C

Solution:

In the given condition angle between $\vec{p}$

and $\vec{E}$ is zero.

Hence potential energy $U = - p E \cos 0 = - p E = min .$

Also in uniform electric field $F_{n e t} = 0$ .

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Electrostatics Question 311

Question: An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively [CBSE PMT 2004]

Options:

Answer:

Solution:

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