Question

An electric field `vec E` and a magnetic field `vec B` exist in a region. The fields are not perpendicular to each other.

विकल्प

• This is not possible.

• No electromagnetic wave is passing through the region.

• An electromagnetic wave may be passing through the region.

• An electromagnetic wave is certainly passing through the region.

Answer 1

An electromagnetic wave may be passing through the region.

For an electromagnetic wave,electric field ,magnetic field and direction of propagation are mutually perpendicular to each other.We can have a region in which electric and magnetic fields are applied at an angle with each other.In transmission lines Different modes exist. In transverse electric (TE) mode-no electric field exist in the direction of propagation. These are sometimes called H modes because there is only a magnetic field along the direction of propagation (H is the conventional symbol for magnetic field).