Answer:
D) Rotate the loop about an axis that is directed in the z direction and that passes through the center of the loop
Explanation:
The magnetic flux is defined as the total magnetic field times the area normal to the magnetic field lines.
Mathematically:
where:
area vector directed normal to the surface
magnetic field vector
- Now as the area of the loop changes there will be a change in magnetic flux.
- Change in the magnetic field strength will also change the flux accordingly.
- Since the loop lies in the x-y plane we will get a different area of normal projection on the plane whenever the inclination of the loop changes in xy-plane.
- Since the area of the loop all remains in the magnetic field while it rotates about the z axis to its center hence this will not affect area subjected to the magnetic field.
Answer:
Numerous experiments have been performed since the formulation of theory of relativity which establish the theory of special relativity, however we shall consider only 2 experiments mentioned below.
1) <u>Michelson Morley experiment:- </u> Since the basic premise of Newtonian mechanics is that motion of two bodies is always relative and there is no absolute speed of an object, the space was thought to be filled with a special material termed as ether that was supposedly present everywhere and since light was supposed to be as a wave, the speed of light was thought to be measured with respect to this imaginary substance that was thought to be invisible. By measuring the difference in the speeds of light when moving in the direction of ether and while moving against the direction of ether would establish the existence of this invisible substance that was thought to be absolute frame of reference of the universe. Michelson Morley used an instrument known as interferometer to measure this difference of speed of light when moving in 2 different directions by making interference patterns of the light when superimposed. The results of the experiment were shocking as no interference patterns were observed thus demolishing the existence of ether and establishing the fact that speed of light is same in all reference frames, a very basic postulate of special theory of relativity.
2) <u>Decay of muons: </u>A basic result that follows from special theory of relativity is that as a object moves faster the time it observes is slower a concept known as time dilatation. This was established by the presence of muons which are elementary particles which are unstable in the lower layer's of atmosphere. Classically the muons should not reach the lower layer's of atmosphere and should decay earlier but as they are observed in the lower layer's of atmosphere because they travel at speeds comparable to speed of light thus the time from a frame attached to muons runs at a slower rate thus giving them time to reach lower region's of atmosphere.
3) GPS systems have been designed taking into effect the calculations predicted by special; theory of relativity.
The point in the orbit of a planet, asteroid, or comet at which it is closest to the sun.
Lowering the temperature will cause a decrease in gas pressure in a closed container. The correct answer is A, lowering the temperature.
Explanation:
The angle of the handle relative to the horizontal is 35°. The angle of the ramp to the horizontal is 7°. So the angle of the handle relative to the ramp is 28°.
cos 28° = 50 / F
F = 50 / cos 28°
F = 56.6 lbs