Fermat's Principle Notes Questions with Answers PDF Download - 75

Law which states that travelling between two points will follow the route with smallest optical path length is called

1. Newton?s principle
2. Fermat?s principle
3. Mate?s principle
4. Gauss?s principle

The force F acting on a particle of electric charge q with instantaneous velocity v, due to an external electric field E and magnetic field B, is given by

1. F=q(E+vxB)
2. F=q(E+v+B)
3. F=q(ExvxB)
4. F=q(Exv+B)

Opposite bound charges can't be separated by microscopic distances in

1. dielectric
2. conductors
3. semiconductors
4. superconductors

When electric field is zero but polarization is not zero in the material, than this phenomenon is called

1. residual polarization
2. spontaneous polarization
3. molecular polarization
4. electrical polarization

Metamaterials consist of periodically or randomly distributed structured elements, whose size and spacing are much smaller than electromagnetic waves

1. resonant frequency
2. wavelength
3. damping factor
4. plasma factor