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4 years ago

8

The beginning balance in a person's savings account was 3600 dollars. After making a withdrawal of 400 dollars but earning inter

est of 16 dollars, what was the new balance in the account?

1 answer:

serious [3.7K]4 years ago

7 0

Answer:

The answer would be 3216.

Step-by-step explanation:

You subtract 400 from 3600 to get 3200. You add 16+ to the answer. Then you get 3216. Voila.

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4 years ago

A transformer increases the input voltage from 12V to 12,000V. What is the ratio of the number of wire turns on the primary coil

erma4kov [3.2K]

Answer:

$\frac{n_p}{n_s}=\frac{1}{1000}$

Step-by-step explanation:

Given voltage of primary coil is $V_p=12V$

And voltage of secondary coil is $V_s=12,000V$

A transformer is a device that contains primary and secondary coil. These coils are mounted on soft iron. The change in voltage depends upon the number of turns of primary coil $(n_p)$ and secondary coil $(n_s)$ .

Following equation represents the relation between them.

$\frac{V_s}{V_p} =\frac{n_s}{n_p}\\\\\frac{12,000}{12}=\frac{n_s}{n_p}\\\\1000=\frac{n_s}{n_p}$

Then, ratio of the number of wire turns on the primary coil to the number of turns on the secondary coil is

$\frac{n_p}{n_s}=\frac{1}{1000}$

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