The answer is D. Mountains in North America appear to be the same as those in Northern Europe
Answer:
a,b,c and d.
Explanation:
Of the following statements the correct are:
a) It is possible to induce a current in a closed loop of wire located in a uniform magnetic field by either increasing or decreasing the area enclosed by the loop.
b) It is possible to induce a current in a closed loop of wire without the aid of a power supply or battery.
d) It is possible to induce a current in a closed loop of wire by change the orientation of a magnetic field enclosed by the wire.
e) It is possible to induce a current in a closed loop of wire by changing the strength of a magnetic field enclosed by the wire.
Answer:
The work done by the force is 150 J.
(d) is correct option.
Explanation:
Given that,
The object moves from 0 to 15 m.
Displacement = 15 m
Suppose the graph shows this force as a function of the position of the object
We need to calculate the work done
According to graph,
W = area under the graph from 0 to 15
![W = \dfrac{1}{2}\times b\times h](https://tex.z-dn.net/?f=W%20%3D%20%5Cdfrac%7B1%7D%7B2%7D%5Ctimes%20b%5Ctimes%20h)
Where, h = height
b = base
Put the value into the formula
![W=\dfrac{1}{2}\times15\times20](https://tex.z-dn.net/?f=W%3D%5Cdfrac%7B1%7D%7B2%7D%5Ctimes15%5Ctimes20)
![W=150\ J](https://tex.z-dn.net/?f=W%3D150%5C%20J)
Hence, The work done by the force is 150 J.
D. The chemical potential energy of real battery decreases, it develops internal resistance and therefore the potential difference across its terminals decreases if its current increases.