Solution to Textbook Problem 6| Electronics and Communication| Class 12 |TN State board #top

Physics Lectures by P.SARAVANAN

Problem solved in this video

Determine the current flowing through 3Ω and 4Ω resistors of the circuit given below. Assume that diodes D1and D2 are ideal diodes.
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Electronics and communication : Solutions to Text Book Problems

Problem 1 :
The given circuit has two ideal diodes connected as shown in figure below. Calculate the current flowing through the resistance R1

Problem 2 :
Four silicon diodes and a 10 Ω resistor are connected as shown in figure below.Each diode has a resistance of 1Ω. Find the current flows through the 10Ω resistor.

Problem 3 :
Assuming VCEsat = 0.2V and β = 50, find the minimum base current (IB) required to drive the transistor given in the figure to saturation.

Problem 4 :
A transistor of α = 0.99 and VBE = 0.7V is connected in the CE configuration as shown in the figure. If the transistor is in the saturation region , find the value of collector current.

Problem 5 :
In the circuit shown in the figure, the BJT has a current gain (β) of 50. For an emitter – base voltage VEB = 600 mV, calculate the emitter – collector voltage VEC (in volts).

Problem 7 :
Prove the following Boolean expressions using the laws and theorems of Boolean algebra.
i) (A+B) (A+B) = A
ii) A(A+B) = AB
iii) (A+B) (A+C) = A+BC

Problem 8 :
Verify the given Boolean equation A + (A)comp (B) = (A + B) using truth table.

Problem 9 :
In the given figure of a voltage regulator, a Zener diode of breakdown voltage 15V is employed. Determine the current through the load resistance, the total current and the current through the diode. Use diode approximation.

Problem 10 :
Write down Boolean equation for the output Y of the given circuit and give its truth table.

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