Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid. Why?

An electrostatic field line cannot be discontinsous. Why ?

No two electric field lines can intersect each other. Why?

Find out the expression for the magnetic field at a point on the axis of a toroid of N turns having average redius r and carrying a corrent I . Show that the magnetic field in the open space inside and outside the toroid is zero.

Let a uniform magentic field’is active within a finite region. A charged particle is entered into the magnetic field. Can the magnetic force on that charge particle confined it into'that region of magnetic field?

Morning after pills can prevent pregnancy if taken within ____ hours

"Morning after Pills" can prevent pregnancy if taken within . . . . Hours.

Can the numbers 1, 2, 3 be the direction ratios of a straight line?

How would you draw diagram of the magnetic lines of force produced due to flow of electric current through a straight conductor and indicate the directions of current and magnetic lines of force in that diagram.