Debye intermolecular forces of attraction occur between polar and nonpolar atoms or molecules.
When a polar molecule is in the vicinity of a nonpolar molecule, the electronegative end of that polar molecule attracts the electron cloud of the adjacent nonpolar molecule, thereby distorting it and inducing a pole separation. So, the polar molecule is said to have induced polarity in the neighboring nonpolar molecule.
As a result, the Debye intermolecular forces occur between dipoles of a polar molecule and induced dipoles of the nonpolar molecule. Hence Debye forces are also known as dipole-induced dipole interactions.
For example, HCl, a polar molecule, induces polarity in neutral, nonpolar He atom.

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Related Reading- Debye Forces