Oral communication involves speaking and listening in real-time. Telephone communication allows verbal interaction between individuals, making it an example of oral communication. Other options like letters, emails, and faxes are forms of written communication.
Why can’t two magnetic field lines cross each other? Draw magnetic field lines showing the direction of the magnetic field due to a current-carrying long straight solenoid. State the conclusion which can be drawn from the pattern of magnetic field lines inside the solenoid.