hi, help pls. I don’t really remember English and what is needed from me here(привет, не собо помнима английский и что от меня здесь нужно)

Answer:
1. An attenuator is used to decrease the value of the input voltage.
2. When minimum grid voltage is produced in zero tubes.
3. Indirect/evasive current plate components are obtained/invited/included/accepted/incorporated.