It is tempting to think that you are like a human camera taking in everything around you. However, you are, in fact, an active participant who is always trying to understand the sensations you are encountering.

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

Explain why electric current cannot exist if a current doesn't have a voltage source.

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.