VR (t) = ( ) x R
= (0.471 ) (100)
= 47.10 Volts
When t = 0.3 seconds;
t
1
VC (t) = ∫ ( )dt
C 0
t
−
= 1 ∫ ( ) dt
50m 0 1 1
1
∫ dx = 1 + C
−
1
= { } { − } 1 −1
50m − 1
dx = −1 + C
∫
−
−
= 20 { }
− − ( . )
= 20 { }
= (20) (−2.5) (0.942)
= −47.09 Volts
74