Answer:
(C)Us Virgin Islands.
Explanation:
In 1917 a treaty was concluded in which the United States purchased the islands for $25,000,000 from Denmark.
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Self-inductance:The coefficient of self inductance will rise as the solenoid's length increases because it is directly related to length: When a coil's turn count is doubled, its coefficient of self-inductance increases by a factor of four. The reason for this is that self-inductance is inversely related to the square of a coil's number of turns.
The inductance increases when the solenoid's length and number of turns are both doubled while maintaining the same cross-sectional area. The answer is "L=mu 0 N2/l A." L is doubled when N and l are both increased.
The flux that is associated with a solenoid when a unit quantity of current is sent through it is the solenoid's self-inductance.
Learn more about Self-inductance here.
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Examples are used to "exemplify" a situation. Hence, we take an abstract theory and we make it more approachable by showcasing some details. Hence, we have that the example makes abstract idea more concrete. The first 2 choices are wrong since they state the opposite. The 3rd choice is rather irrelevant, examples can make it more or less didactic. Hence, the 4th choice is correct.
The migration of the Aryans to India was significant, because they expanded a huge empire spanning the whole of the Indian subcontinent and what is now modern-day Afghanistan and Iran. The Indo-Aryan languages are still spoken nowadays in India, Pakistan, Sri Lanka, Bangladesh, Nepal, Fiji and the Maldives. The Aryans also introduced the horse and chariot into the area. They established powerful kingdoms and principalities in the zone.
