Answer to Question #164124 in Electrical Engineering for oday

Question

An a.c. voltage  of peak value 20 V is connected  in series with  a silicon diode  and load resistance  of 500  O. If the forward  resistance  of the diode  is

10 0, then the peak current  through

:the diode  is

37.8 mA  0

 

 

39.8 mA  0

 

 

35.7 mA  0

 

 

36.5 mA  0

Answer 1

Three elements of the electrical circuit are connected in series, so the current flowing through each element will be the same. In a silicon diode operating at its rated currents, the voltage drop is about 0.7 volts. The total resistance of the electrical circuit is 500 ohms + 10 ohms = 510 ohms. According to Ohm's law, the current will be

$$I=\frac {20V-0.7V} {500\Omega+10\Omega}\approx0.037843A\approx37.8mA$$

Answer: 37.8mA