The rectified output from a circuit is connected to a resistor R of resistance 1000 . Graph

The rectified output from a circuit is connected to a resistor R of resistance 1000 Ω. Graph A shows the variation with time t of the p.d. V across the resistor. Graph B shows the variation of V when a capacitor is placed across R to smooth the output.

Explain how the rectification is achieved. Draw a circuit diagram to show the components involved.
a. Explain the action of the capacitor in smoothing the output.
b. Using graph B between t = 0.005 and t = 0.015 s, determine:
i. The time during which the capacitor is charging
ii. The mean value of the p.d. across R
iii. The average power dissipated in R.

Transcribed Image Text:

V/V V/V 1.0 1.0- 0.8 0.8 0.6 0.6- 0.4 0.4 0.2- 0.2 04 0.01 0.02 Graph A 0.03 t/s 0.01 0.02 0.03 0.04 t/s Graph B Figure 27.20