Answer:
B landforms
Explanation:
Glaciers carve a set of distinctive, steep-walled, flat-bottomed valleys. U-shaped valleys, fjords, and hanging valleys are examples of the kinds of valleys glaciers can erode.
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The answer is autotransformer.
A transformer used in electrical systems that has a single coil winding that is shared by the primary and secondary circuits.
What is an autotransformer?
- An electrical transformer with just one winding is known as an autotransformer. The prefix "auto" (Greek for "self") denotes a single coil functioning independently, not any sort of mechanical device. In an autotransformer, different sections of the same winding serve as the transformer's primary winding and secondary winding sides. An regular transformer, on the other hand, has separate primary and secondary windings with no metallic conducting channel in between.
- At least three taps on the autotransformer winding are used to connect electrical devices. Autotransformers have the benefit of frequently being smaller, lighter, and less expensive than conventional dual-winding transformers, but the drawback of not offering electrical isolation between primary and secondary circuits.
- Other advantages of autotransformers include lower leakage reactance, lower losses, lower excitation current, and increased VA rating for a given size and mass.
- One type of traveler's voltage converter, which enables the use of 230-volt equipment on 120-volt supply lines or the reverse, is an example of an autotransformer in use.
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<span>Total length around West Berlin is 155km or <span>91 miles</span></span>