Answer
427.5k+ views
Hint: Dynamic resistance is also known as AC Forward resistance. You can use the formula for the dynamic resistance for a forward bias which can be defined as a ratio of change in voltage across the diode to the change in current through it.
Step by Step Solution:
Ideal diode is a type of electrical component which functions like an ideal conductor when the voltage is used in the fore-way and an ideal insulator when the voltage is used in the reverse. Dynamic resistance for a forward bias can be calculated using the formula,
$ {r_f} = \dfrac{{\Delta V}} {{\Delta I}} $
Where ${r_f} $ is the dynamic resistance, $\Delta V$ is the change in voltage across the diode and $\Delta I$ is the change in current across the diode.
Firstly, we have to calculate the voltage across the diode when the resistance is static.
The formula for static resistance is
${R_f} = \dfrac{V}{I}$
Where ${R_f} $ is the static resistance, $V$ is the voltage across the diode and $I$ is the current flowing through the diode.
Given,
Static Resistance, ${R_f} = 4.5\Omega $
Current flowing through the diode, $I = 43.8mA$ OR $I = 0.0438A$
Therefore,
$V = 4.5 \times 0.0438$
$V = 0.1971volts$
Now, calculating the change in voltage across the diode,
$\Delta V = 0.1971 - 0.1$
$\Delta V = 0.0971volts$
The current through the germanium diode remains constant throughout therefore, we can right,
$\Delta I = 0.0438A$
Now, calculating the dynamic resistance across the germanium diode,
${r_f} = \dfrac{{\Delta V}} {{\Delta I}} $
${r_f} = \dfrac{{0.0971}}{{0.0438}}$
${r_f} = 2.25\Omega $
The dynamic resistance for a forward bias of $0.1volt$ is $2.25\Omega $
Note: The current passing through a diode can only go one way, which is called the forward direction. The reverse path is actually blocked to flow. It's like an automated one-way valve. If there is a negative voltage in the diode, then no current can flow and the ideal diode is an open circuit
Step by Step Solution:
Ideal diode is a type of electrical component which functions like an ideal conductor when the voltage is used in the fore-way and an ideal insulator when the voltage is used in the reverse. Dynamic resistance for a forward bias can be calculated using the formula,
$ {r_f} = \dfrac{{\Delta V}} {{\Delta I}} $
Where ${r_f} $ is the dynamic resistance, $\Delta V$ is the change in voltage across the diode and $\Delta I$ is the change in current across the diode.
Firstly, we have to calculate the voltage across the diode when the resistance is static.
The formula for static resistance is
${R_f} = \dfrac{V}{I}$
Where ${R_f} $ is the static resistance, $V$ is the voltage across the diode and $I$ is the current flowing through the diode.
Given,
Static Resistance, ${R_f} = 4.5\Omega $
Current flowing through the diode, $I = 43.8mA$ OR $I = 0.0438A$
Therefore,
$V = 4.5 \times 0.0438$
$V = 0.1971volts$
Now, calculating the change in voltage across the diode,
$\Delta V = 0.1971 - 0.1$
$\Delta V = 0.0971volts$
The current through the germanium diode remains constant throughout therefore, we can right,
$\Delta I = 0.0438A$
Now, calculating the dynamic resistance across the germanium diode,
${r_f} = \dfrac{{\Delta V}} {{\Delta I}} $
${r_f} = \dfrac{{0.0971}}{{0.0438}}$
${r_f} = 2.25\Omega $
The dynamic resistance for a forward bias of $0.1volt$ is $2.25\Omega $
Note: The current passing through a diode can only go one way, which is called the forward direction. The reverse path is actually blocked to flow. It's like an automated one-way valve. If there is a negative voltage in the diode, then no current can flow and the ideal diode is an open circuit
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Bimbisara was the founder of dynasty A Nanda B Haryanka class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)