Saved Bookmarks
| 1. |
If the effective value of current on 50 Hz a.c. circuit is 5.0 A. What is (i) peak value of current, (ii) the mean value of current over a half a cycle and (iii) the value of current 1/300 s after it was zero? |
|
Answer» Solution :DATA supplied , `I_m = 5A , V = 50 Hz` i. `i_m = sqrt(2) I_(rms) = sqrt(2) XX 5 = 7.07A` II.`i_m= 2/pi i_m = 0.636 xx 7.07 = 4.5 A` iii.`I = i_m sin 2pi v t = 7.07 xx sin (2pi xx 50 xx 1/300) = 7.07 sin pi/3 = 7.07 x (sqrt3)/(2) = 6.12A` |
|