Answer:
B. 0 degrees
Explanation:
The magnetic flux through a certain area enclosed by a loop of wire immersed in a region with magnetic field is given by:
![\Phi = B A cos \theta](https://tex.z-dn.net/?f=%5CPhi%20%3D%20B%20A%20cos%20%5Ctheta)
where
B is the strength of the magnetic field
A is the area enclosed by the coil
is the angle between the direction of the magnetic field and the direction of the normal to the coil
From the equation above, we see that the magnetic flux is maximum when
![cos \theta=1](https://tex.z-dn.net/?f=cos%20%5Ctheta%3D1)
So when the field is parallel to the normal to the coil (so, when it is perpendicular to the coil), therefore when:
![\theta=0^{\circ}](https://tex.z-dn.net/?f=%5Ctheta%3D0%5E%7B%5Ccirc%7D)
So, the correct option is
B. 0 degrees
Igneous intrusions form when magma cools and solidifies before it can reach the surface. An extrusion consists of extrusive rock; which forms above the surface of the crust.
There are no probably-true statements on the list of choices that you provided.
Answer:
Self control
Explanation:
Self control involves individuals having a strong discipline towards certain conditions. The conditions could be cravings for something or other forms of activities.
Self control is usually developed by people who practice self-regulation through physical exercise and time-managed programs experience as they have been known to bring about an increase in it.
Answer: More work will be done in case A
Explanation:
Work is said to be done when a force applied to an object causes the object to move through a distance or height.
Work = Force × distance
If the heavy load is pulled straight up with a massless rope, then the object is pulled through a height at an angle perpendicular to the ground (i.e 90°)
Much work will be done in case A and less work in case B. Less work is done in case B due to the use of a machine which is an inclined plane. The use of machine makes work much easier and it allows us to do work in a more convenient manner. It allow us to overcome a much larger load using minimal effort. For the first case, much work will be done since we are carrying through a vertical height which requires more effort compare to when an inclined plane is used.
Also note that the higher the angle of inclination, the more the work done on the object and vice versa