# PHY301 Circuit Theory GDB Solution Spring 2014

“What type of current flows through a Diode PN-junction when it is normally reversed biased? Would there be any effect of increase in temperature on this current. How that current behaves when reversed biased on PN-junction is increased abnormally (Near or above the breakdown voltage” Solution: A diode is an electrical device allowing current to move through it in one direction […]

# PHY301 Circuit Theory GDB Solution Fall 2013

The topic is: “Tell the type of materials in which we can make control over charge carriers. Describe the current types in such materials and their respective directions”. Solution: Charge Carriers in Semiconductors Current is the rate at which charge ows. In a semiconductor, two types of charge carrier, the electron and the hole, can contribute […]

# PHY301 Circuit Theory Assignment 3 Solution Fall 2013

Q 1:   Find the current I0 of the given network, by using superposition method. Write each step of calculation. Draw the circuit diagram where necessary and mention the units of calculated values. Q 2: Find the Norton equivalent circuit for the portion of the network to the left of a-b in given figure. Show each step of calculation otherwise you will lose your marks. Draw and label the circuit diagram of each step and […]

# PHY301 Circuit Theory Assignment No 1 Solution Fall 2013

Q 1:   Find the equivalent resistance RTof given circuit and current flowing through equivalent circuit. Write each step of the calculation to get maximum marks. Draw the circuit diagram of each step otherwise you will loose marks. Solution:  Rt=4KΩ It=5mA Q 2: Determine the voltage and current across 2kΩ resistor for the given circuit. Mention the […]

# PHY301 Circuit Theory GDB Solution Spring 2013

Diodes are used in all electronic devices but now mostly these are replaced by LEDs. Why is it going so? How are these better than ordinary diodes? A diode allows electricity to flow in one direction only and blocks the flow in the opposite direction. They may be regarded as one-way valves and they are used in various […]

# PHY301 Circuit Theory Assignment 2 Solution Spring 2013

Q 1:    Find the source voltage Vs of the given network, if power dissipated across 9Ω resistance is 100 watts. Mention the units of calculated values.  Q 2: Using Nodal analysis, determine the current Io through 6kΩ resistor for the given circuit. Label the diagram properly. Q 3: Write the functions of Resistor and Capacitor and their applications in every day         electronic […]

# PHY301 Circuit Theory Assignment 1 Solution Spring 2013

Q 1: Find the equivalent resistance RTof given circuit. Write each step of the calculation to get maximum marks. Draw the circuit diagram of each step otherwise you will loose marks. Answer is RT = R1 + R2                 =4.87Ω + 5Ω   = 9.87Ω Q 2: Determine the voltage and current across each resistor for the given circuit. […]

# PHY301 GDB Solution 30 Jan 2013

Usually mobile phone battery require very low level DC voltage and current for charging, while our house hold wiring contains high level AC voltage (220V) and sinusoidal current(AC). How this becomes possible for Charger to overcome this issue? Solution: Charger collects 220V from A.C Supply and then converts into required level through transformer. After this […]

# PHY301 Circuit Theory Assignment 3 Solution Fall 2012

Using the Source transformation method, find Vo in the network given below. Label and draw each step where it required. Write each step of the calculation to get maximum marks and also mention the units of each derived value. Q.2: Find IO in the network given below using Norton’s theorem. Show each step of calculation […]