The flux through a loop of wire changes uniformly from 37Wb to -15Wb in 1.6ms .
ID: 1978220 • Letter: T
Question
The flux through a loop of wire changes uniformly from 37Wb to -15Wb in 1.6ms .
Part B
What is the average induced emf in the loop?
Express your answer using two significant figures.
=? V
Part C
If you wanted to double the average induced emf by changing only the time, what would the new time interval be?
Express your answer using two significant figures.
t=? ms
Part D
If you wanted to double the average induced emf by changing only the final flux value, what would it be?
Express your answer using two significant figures.
= ? Wb
Help please? How do I approach this step by step
Explanation / Answer
solved a similar question already with different numbers.. i put the question and the answer.. hope it helps!! :) kindly rate a life saver :)
The flux through a fixed loop of wire changes uniformly from +31 Wb to -25 Wb in 2.2 ms.
(a) What is the significance of the negative flux?
(b) What is the average induced emf in the loop?
ANSWER:
/t = (-25 - 31)Wb/(2.2x10^-3s) = -2.55x10^4V
a) The negative flux means that the direction of the changing flux is in opposition to the initial flux
b) emf = - /t = - -2.55x10^4V = 2.55x10^4V