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EEE231 Electronics I Assignment No 02 Solution & Discussion 

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Diode Circuit Problem - 1  :-Find the current flowing in the diode shown in the circuit given below.Also find the output voltage.Given the diode is ideal.

(Answer :- Current flowing = 30 miliampere, output voltage = 0 V )

Diode Circuit Problem - 2:-A resistance of 1 Kilo ohm is connected in parellel with a ideal diode, this whole combination is connected in series with the another 1 kilo ohm resistor, this whole circuit is connected with the 30 V supply. Calculate the:-

(1) Current drawn by the whole circuit.   ( Answer :-30 mA )

(2) Current flow in the diode connected branch.(Answer :- 30 mA )

(3) Current flow in the resistance which is parellel with the diode.(Answer :- 0 A )

(4) Output voltage i.e. voltage across the output resistance. (Answer :- 0 V )

COMSATS Institute of Information Technology

Virtual Campus

Islamabad

Electronics 1- EEE 231

Assignment No. 2

Question 1

Determine the current ID and the diode voltage VD for the circuit shown below. For this circuit VDD = 5V and R=1kΩ. Assume that the diode has a current of 1 mA at a voltage of 0.7 V and that its voltage drop changes by 0.1 V for every decade change in current.                     

 

Question 2

Find the current flowing in the diode shown in the circuit given below.Also find the output voltage. Given the diode is ideal.Note : voltage is 30 V in the figure and resistor is 1 K Ohms.

Question 3

A resistance of 1 Kilo ohm is connected in parellel with an ideal diode, this whole combination is connected in series with another 1 Kilo ohm resistor, this whole circuit is connected with the 30 V supply. Calculate the:-

(1) Current drawn by the whole circuit.  

(2) Current flow in the diode connected branch.

(3) Current flow in resistance which is parellel with the diode.

(4) Output voltage i.e. voltage across the output resistance.

Question 4

Find the current and voltage across the resistance shown in the figure. Take the diode as ideal.                            

 

 

Question 5

The diode connected in the circuit shown below is made up of silicon. Calculate the current and the output voltage of the circuit.

Diode Circuit Problem - 5:- The diode connected in the circuit shown below is made up of silicon. Calculate the current and the output voltage of the circuit.

(Answer :- 2.07 mA, -0.45 V ).

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