Which statement about the spread of Hinduism is best supported by the information in the excerpt?

Assume that the rod in Fig.31.2 has a length of 0.86 m,the resistor has value 2.2 ,and a magnetic field of 8.0 T is directed int

frutty [35]

1) 0.48 m/s

2) Clockwise

3) 10.3 N

Explanation:

1)

The figure is missing: find it in attachment.

As the rod is pulled along the rails, in the region of magnetic field, an electromotive force is induced in the rod itself, due to the change in magnetic flux through the circuit enclosed by the rod and the rails.

The magnitude of this induced electromotive force (which is equivalent to the potential difference induced in the rod) is

$V=BvL$

where:

B is the strength of the magnetic field

v is the speed of the rod

L is the length of the rod

Also we know that according to Ohm's law, the potential difference across the resistance is equal to

$V=RI$

where

R is the resistance of the rod

I is the current

Since the potential difference across the resistor is equal to the potential difference across the rod, we can combine the two equations, and we get:

$BvL=RI\\v=\frac{RI}{BL}$

Here we have:

$R=2.2 \Omega\\B=8.0 T\\L=0.86 m\\I=1.5 A$

Therefore, the speed of the rod must be:

$v=\frac{(2.2)(1.5)}{(8.0)(0.86)}=0.48 m/s$

2)

Here we have to apply Lenz's law, which states that the direction of the induced emf (and so, of the induced current) is such that it opposes the change in magnetic flux through the system.

First of all, here we notice that as the rod moves, the area enclosed by the circuit decreases: this means that the magnetic flux through the circuit decreases too.

As a result, the induced current must produce a magnetic field which goes in the same direction as the external field, in order to "restore" the magnetic flux. Here the external magnetic field points inside the paper, so the magnetic field produced by the induced current must also point inside the paper.

In order for that to happen, we see that the induced current must flow clockwise: in fact, if we take the rod and we apply the right-hand rule, we see that if we place the thumb towards the left (direction of the clockwise current), the other fingers "wrapped" point into the paper at the center of the circuit, so this is the correct direction.

3)

A current-carrying wire in a magnetic field experiences a force of magnitude

$F=ILB$

where

I is the current

L is the length of the wire

B is the strength of the magnetic field

Here we have

I = 1.5 A

L = 0.86 m

B = 8.0 T

So the force experienced by the rod is

$F=(1.5)(8.0)(0.86)=10.3 N$

Therefore, we must apply an equal and opposite force of 10.3 N in order to maintain keep the acceleration of the rod to zero, so that the velocity is constant, and the current is constant as well.

7 0

3 years ago

What is the term for people that were NOT

mart [117]

Answer:

Naturalization is the process of becoming a U.S. citizen if you were born outside of the United States

Explanation:

6 0

3 years ago

In studies, reminding female test-takers that women historically have done poorly on a similar test can lead to lower test perfo

yuradex [85]

Answer:

Stereotype threat

Explanation:

In studies, reminding female test-takers that women historically have done poorly on a similar test can lead to lower test performance--- particularly when compared with the sources of women who weren’t given such information. This decline in performance is an example of stereotype threat.

In this type of stereotype, there is a threat of confirming to the stereotypes that have already been set by the society. The fear of doing bad instead of good in tests eventually leads them to do bad and confirm the negative stereotypes.

3 0

3 years ago

Following the wourld war

worty [1.4K]

Answer:

what?

Explanation:

4 0

3 years ago

Read 2 more answers

“As long as the reason of man continues fallible, and he is at liberty to exercise it, different opinions will be formed . . . T

ivann1987 [24]

Answer:

B, to strengthen factions.

Explanation:

“As long as the reason of man continues fallible, and he is at liberty to exercise it, different opinions will be formed . . . The diversity in the faculties of men, from which the rights of property originate, is not less an insuperable obstacle to a uniformity of interests. The protection of these faculties is the first object of government. From the protection of different and unequal faculties of acquiring property, the possession of different degrees and kinds of property immediately results; and from the influence of these on the sentiments and views of the respective proprietors, ensues a division of the society into different interests and parties.”

We can eliminate A and C, the author seems to be in favor of them. They don't seem to be referring to Controlling the factions, so I think B is the best answer.

3 0

3 years ago