We have no idea, because there's no given information with this question.
Answer:
(A) 64.7172 VOLT (B) 6.471 A
Explanation:
We have given number of turns in primary that is 
And number of turns in secondary that is 
Primary voltage 
(a) We have to find the secondary voltage
For transformer we know that 


(b) It is given that a resistance of 100 ohm is connected across secondary so current in secondary 
Answer:
Check the explanation
Explanation:
so basically the standing wave will be created by two waves... y1 and the wave reflected, ie, y2=Asin(wt+Kx)..
so the resulting wave will be Y= y1 + y2 = 2A Sin(Kx) Cos(wt) = y(x) y(t)
so y(x)= 2ASin(Kx) and y(t)=Cos(wt)...
Astronomers use the color of stars to determine how hot they are and their brightness to estimate how far away they are. <em>(D)</em>