Page 28 - Schaum's Outline of Theory and Problems of Electric Circuits

CIRCUIT CONCEPTS
CHAP. 2]
Assuming zero initial charge on the capacitor, 17
ð
1
v C ¼ idt
C
For 0 t 1 ms,
ð
1 t 4 7 2
v C ¼ 10 tdt ¼ 10 t ðVÞ
5 10 4 0
This voltage reaches a value of 10 V at 1 ms. For 1 ms < t < 2 ms,
3 3
v C ¼ð20 10 Þðt 10 Þþ 10 ðVÞ
See Fig. 2-14.

Fig. 2-14

2.8 A single circuit element has the current and voltage functions graphed in Fig. 2-15. Determine
the element.

Fig. 2-15