a)
When the motor is first turned on, the coils are initially stationary. Thus, there is no change in magnetic flux and, consequently, no induced emf.

Therefore:
$iR = \epsilon - \epsilon_{back}$

Since there's no back emf:
$iR = \epsilon$

Solving for i using Ohm's Law:
$i = \frac{\epsilon}{R}\\\\i = \frac{120}{10} = \boxed{12.0 A}$

We are given that at max speed, the back EMF is 70.0 V.

Using the same equation as above:
$iR = \epsilon - \epsilon_{back}$

Plugging in the values:
$10i = 120 - 70 \\\\10i = 50 \\\\$

Solving for current:
$i = \frac{50}{10} = \boxed{ 5.0 A}$

8 0

1 year ago

Can prokaryotes have more than one cell

Westkost [7]

I think the answer is yes, but i might be wrong

5 0

3 years ago

Read 2 more answers

A zone reconnaissance involves a directed effort to obtain detailed information on all routes, obstacles, terrain, enemy forces,

son4ous [18]

Answer:

It is True

Explanation:.

A commander assigns a zone reconnaissance mission when he seeks additional information on a zone before committing other forces in the zone. It is appropriate when the enemy situation is vague, existing knowledge of the terrain is limited, or combat operations have altered the terrain. A zone reconnaissance could include several route or area reconnaissance missions assigned to subordinate units.

7 0

2 years ago