When the weather is dry, Xiaohong combs her hair with a plastic comb and finds that the more she combs her hair, the more fluffy it is because _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

When the weather is dry, Xiaohong combs her hair with a plastic comb and finds that the more she combs her hair, the more fluffy it is because _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ① When combing your hair with a plastic comb, your hair will be charged due to friction; Among them, the charge of hair and comb is different, and the charge of hair is the same, which repels each other, so the more combed the hair, the more fluffy it becomes.

Because the hair is light and small with different charges, and the comb is charged and has the property of attracting light and small objects, so the hair will float with the comb.

(2) When the moving-coil microphone works, the sound makes the diaphragm drive the coil to vibrate together, and the coil cuts the magnetic induction line, which can generate a current that varies with the sound;

The working principle of moving coil microphone is electromagnetic induction phenomenon, and the working principle of generator is also electromagnetic induction phenomenon. The working principle of the motor is that the electrified wire is stressed in the magnetic field, so the principle of the generator is similar to that of the moving coil microphone.

So the answers are as follows: ① Like charges repel each other, and charged bodies attract light and small uncharged objects; ② Current, generator.