Can anyone help me with this problem set... i got to do many assignment on my other subjects, can anyone help me to answer this...ill give medal.

Question

caerus · Answer

attachment

caerus · Answer

@IrishBoy123  @osprey

irishboy123 · Answer

@Caerus

happy to help, mate.

which one first?

caerus · Answer

@IrishBoy123 
its good if we start no. 1 :)

irishboy123 · Answer

|dw:1481187995508:dw|

irishboy123 · Answer

by 25-cycle, i assume that we mean 25 cycles per second.  gonna check that w/ @osprey

so $f = 25, \omega = 2 \pi f$ and we have 

$V(t) = 340 \sin (2 \pi \cdot 25 ~ t) = 340 \sin (50 \pi ~ t)$

so you want these points
|dw:1481188592659:dw|

ie $V(\color{red}{0.007})$ and $V(0.02 \color{blue}{+ 0.01})$ which you can get from your calculator

to be clear, period $T = \dfrac{1}{f} = 0.04$sec

caerus · Answer

so how can we solve for emf for 0.007 and 0.01 @IrishBoy123

irishboy123 · Answer

just  stuff it in yer calculator

$$V(0.007) = 340 \sin (50 \pi \cdot 0.007)$$

$$ V(0.02 + 0.01) = 340 \sin (50 \pi \cdot (0.02 + 0.01))$$

i called it V for voltage, you can call it E and it might be more obvious....

caerus · Answer

@osprey

caerus · Answer

why he add 0.02 + 0.01..is that correct, check question b. it says negative..

caerus · Answer

@IrishBoy123