Hi there!
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:
Since there's no back emf:
Solving for i using Ohm's Law:
b)
We are given that at max speed, the back EMF is 70.0 V.
Using the same equation as above:
Plugging in the values:
Solving for current:
Answer:
D) it explodes as a super nova
Explanation:
Answer:
resultant displacement ( maybe ) is
3.658km E 80.8° S
Explanation:
resolve the components into vertical and horizontal forms. Find the vector sum of each . uisng Pythagoras theorem find the resultant and using sohcahtoa find the direction
Answer:
60/90
Explanation:
I think because the train's highest velocity is 60 n the time is 90
