# 22 Lecture

## PHY301

### Midterm & Final Term Short Notes

## Source Transformation and examples

Source transformation is a technique that is commonly used in circuit theory to simplify circuits and to make analysis easier.

**Important Mcq's**

Midterm & Finalterm Prepration

Past papers included

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**Which of the following is true about source transformation?**

A. It is used to replace a resistance with an equivalent source.

B. It is used to replace a voltage source with an equivalent current source.

C. It is used to replace a current source with an equivalent voltage source.

D. It is used to replace a capacitor with an equivalent inductor.

**Answer: B**

**What is the equivalent current source for a voltage source of 20V and resistance of 5??**

A. 5A

B. 2A

C. 4A

D. 10A

**Answer: B**

**What is the equivalent voltage source for a current source of 3A and resistance of 2??**

A. 6V

B. 1.5V

C. 5V

D. 7V

**Answer: A**

**When should source transformation be used in circuit analysis?**

A. When there are only voltage sources in the circuit.

B. When there are only current sources in the circuit.

C. When there are both voltage and current sources in the circuit.

D. When there are capacitors and inductors in the circuit.

**Answer: C**

**What is the equation for calculating the current through a voltage source?**

A. I = V/R

B. V = I*R

C. R = V/I

D. I = R/V

**Answer: A**

**What is the equation for calculating the voltage drop across a resistance?**

A. I = V/R

B. V = I*R

C. R = V/I

D. I = R/V

**Answer: B**

**What is the equivalent current source for a voltage source of 12V and resistance of 6??**

A. 2A

B. 1.5A

C. 4A

D. 3A

**Answer: A**

**What is the equivalent voltage source for a current source of 5A and resistance of 3??**

A. 15V

B. 8V

C. 3V

D. 1.5V

**Answer: A**

**Which of the following is not an advantage of using source transformation in circuit analysis?**

A. It simplifies the circuit.

B. It reduces the number of different types of sources in the circuit.

C. It makes analysis easier.

D. It increases the complexity of the circuit.

**Answer: D**

**What is the purpose of source transformation?**

A. To replace a resistance with an equivalent source.

B. To replace a voltage source with an equivalent current source.

C. To replace a current source with an equivalent voltage source.

D. To replace an inductor with an equivalent capacitor.

**Answer: B**

**Subjective Short Notes**

Midterm & Finalterm Prepration

Past papers included

Download PDF
**What is source transformation?**

**Answer:** Source transformation is a technique used in circuit theory to replace a voltage source with an equivalent current source or vice versa while maintaining the same behavior of the original circuit.

**What is the purpose of source transformation?**

**Answer:** The purpose of source transformation is to simplify circuits and to make analysis easier.

**When is source transformation particularly useful?**

**Answer: **Source transformation is particularly useful in situations where a circuit contains both voltage sources and current sources, and it is desired to convert them into a single type of source.

**How do you transform a voltage source into an equivalent current source?**

**Answer:** To transform a voltage source into an equivalent current source, we divide the voltage by the resistance to get the current. This current value is then used to create an equivalent current source with the same resistance as the original voltage source.

**How do you transform a current source into an equivalent voltage source?**

**Answer:** To transform a current source into an equivalent voltage source, we multiply the current by the resistance to get the voltage. This voltage value is then used to create an equivalent voltage source with the same resistance as the original current source.

**What is the equation for calculating the current through a voltage source?**

**Answer:** The equation for calculating the current through a voltage source is I = V/R, where I is the current, V is the voltage, and R is the resistance.

**What is the equation for calculating the voltage drop across a resistance?**

**Answer: **The equation for calculating the voltage drop across a resistance is V = I*R, where V is the voltage, I is the current, and R is the resistance.

**What is the equivalent current source for a voltage source with 10V and 5? resistance?**

**Answer:** The equivalent current source for a voltage source with 10V and 5? resistance is a current source with 2A and 5? resistance.

**What is the equivalent voltage source for a current source with 4A and 8? resistance?**

**Answer:** The equivalent voltage source for a current source with 4A and 8? resistance is a voltage source with 32V and 8? resistance.

**What is the advantage of using source transformation in circuit analysis?**

**Answer:** The advantage of using source transformation in circuit analysis is that it simplifies the circuit and makes analysis easier by reducing the number of different types of sources in the circuit.