Formulate the second rule of the right hand.

If you grasp the solenoid with your right hand so that four fingers indicate the direction of the current, then your thumb will indicate the direction of the magnetic lines inside the solenoid.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.