Fermat's Principle Notes Questions with Answers PDF Download – Test 75

MCQ 371: 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

MCQ 372: 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)

MCQ 373: Opposite bound charges can't be separated by microscopic distances in:

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

MCQ 374: 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

MCQ 375: 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