Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > The hybrid parameter h11is called?a)short cir...
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The hybrid parameter h11 is called?
- a)short circuit input impedance
- b)short circuit forward current gain
- c)open circuit reverse voltage gain
- d)open circuit output admittance
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The hybrid parameter h11is called?a)short circuit input impedanceb)sho...
h11 = V1/I1 |V2 = 0. So the hybrid parameter h11 is called short circuit input impedance.
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The hybrid parameter h11is called?a)short circuit input impedanceb)sho...
Understanding Hybrid Parameters
Hybrid parameters, or h-parameters, are used to characterize the behavior of linear electronic devices, particularly transistors in small-signal models. Among these parameters, h11 plays a crucial role.
What is h11?
- Definition: h11 is defined as the short circuit input impedance of a two-port network, typically a transistor.
- Significance: It represents how much input impedance the device presents when the output is shorted, providing insights into the device's input characteristics.
Why is h11 the Correct Answer?
- Short Circuit Condition: The term "short circuit" indicates that the output is connected directly to ground (zero voltage), allowing us to measure how the input behaves under this condition.
- Impedance Measurement: When the output is shorted, the input impedance can be determined by applying a small signal voltage and measuring the resulting input current.
Other Hybrid Parameters for Comparison
- h21 (Short Circuit Forward Current Gain): This measures the current gain from input to output when the output is shorted.
- h12 (Open Circuit Reverse Voltage Gain): This parameter indicates the voltage gain from output to input when the input is open-circuited.
- h22 (Open Circuit Output Admittance): This describes the output admittance when the input is left open.
Conclusion
In summary, h11 is specifically the short circuit input impedance. Understanding this parameter is vital in analyzing and designing amplifier circuits, ensuring optimal performance for electronic devices.
Hybrid parameters, or h-parameters, are used to characterize the behavior of linear electronic devices, particularly transistors in small-signal models. Among these parameters, h11 plays a crucial role.
What is h11?
- Definition: h11 is defined as the short circuit input impedance of a two-port network, typically a transistor.
- Significance: It represents how much input impedance the device presents when the output is shorted, providing insights into the device's input characteristics.
Why is h11 the Correct Answer?
- Short Circuit Condition: The term "short circuit" indicates that the output is connected directly to ground (zero voltage), allowing us to measure how the input behaves under this condition.
- Impedance Measurement: When the output is shorted, the input impedance can be determined by applying a small signal voltage and measuring the resulting input current.
Other Hybrid Parameters for Comparison
- h21 (Short Circuit Forward Current Gain): This measures the current gain from input to output when the output is shorted.
- h12 (Open Circuit Reverse Voltage Gain): This parameter indicates the voltage gain from output to input when the input is open-circuited.
- h22 (Open Circuit Output Admittance): This describes the output admittance when the input is left open.
Conclusion
In summary, h11 is specifically the short circuit input impedance. Understanding this parameter is vital in analyzing and designing amplifier circuits, ensuring optimal performance for electronic devices.
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