Torque on a dipole:

$\overline{){\mathbf{\tau}}{\mathbf{=}}{\mathbf{P}}{\mathbf{E}}{\mathbf{s}}{\mathbf{i}}{\mathbf{n}}{\mathbf{\theta}}}$ where P is the dipole moment and E is the electric field.

The permanent electric dipole moment of the water molecule (H_{2}O) is 6.2×10^{−30}C⋅m.

What is the maximum possible torque on a water molecule in a 3.6×10^{8} N/C electric field?

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