we know that U = - PE cos(theta), what does (-) sign indicates??
The electric dipole is an arrangement which consists of two equal and opposite charges +q and -q separated by a small distance 2a. Potential energy due to electric dipole as a whole would be sum of potential due to the charges +q and -q.
work done is negative because rotation (theta) is opposite to the torque
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The electric dipole is an arrangement which consists of two equal and opposite charges +q and -q separated by a small distance 2a. Potential energy due to electric dipole as a whole would be sum of potential due to the charges +q and -q.
work done is negative because rotation (theta) is opposite to the torque