Presuming you have a closed circuit, when you thrust a bar magnet to and fro into a coil of wire, you induce:.
1. Direct Current
2. Alternating voltage only,
3. Not current
4. Alternating Current
5. Neither DC nor AC

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Debris produced by mining is called

Which of the following list the divisions of the geologic time scale in order from longest to shortest