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Reverse resistance refers to the opposition to the flow of electric current in the reverse direction within a semiconductor device, such as a diode or transistor. In these devices, reverse resistance is typically much higher than forward resistance, allowing current to flow primarily in one direction. This characteristic is crucial for the functionality of components like diodes, which are designed to block current flow when reverse-biased. High reverse resistance helps prevent unwanted current leakage, ensuring efficient operation in electronic circuits.
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What is the behavior of a forward and reverse biased diode?
Forward Resistance:def: It is resistance offered by diode to the forward bias is known as forward resistance.This resistance is not the same for the flow of DC as for the changing current. Accordingly this resistance is of two types :1. DC FORWARD RESISTANCE.2. AC FORWARD RESISTANCE.1. DC forward resistance: It is the opposition by diode to the DC. It is measured by the ratio of DC voltages across the diode to the resulting DC current through it.2. AC forward resistance: It is the opposition offered by the diode to the changing current. It is measured by the ratio of change in voltage across diodes to the resulting change in current through diode. The AC forward resistance is more significant as the diodes are generally used with alternating voltage.Reverse Resistance:def: The resistance offered by the diode to the reverse bias is known as Reverse Resistance. It can be DC reverse resistance or AC reverse resistance depending upon whether the reverse bias is direct or changing voltage. Idealy the reverse resistance of a diode is infinte however in practice the reverse resistance is not infinite because for any value of reverse bias, there does exist a small leakage current. It may be emphasized their that reverse resistance is very large compared to the forward resistance.These Definitions are from PRINCIPLES OF ELECTRONICS by V.K MEHTA and ROHIT MEHTA
Why is reverse bias resistance high?
Because of high study demand
Why the resistance of forward bias is equals to zero nd resistance of reverse bias is infinite?
the junction is conducting when forward biased, approaching zero resistancethe junction is nonconducting when reverse biased, approaching infinite resistanceneither is exactly zero or infinite
What is the resistance of SCR anode and Cathode?
The resistance of a Silicon Controlled Rectifier (SCR) anode and cathode is typically very low when the SCR is in the forward conducting state, allowing current to flow easily. In the reverse state, the resistance is very high, effectively blocking current flow. The exact resistance values can vary based on the specific SCR model and operating conditions, but the general principle remains the same: low resistance in the forward direction and high resistance in the reverse direction.
Why reverse cycle airconditioning is not more effective in winter?
A Reverse cycle Air conditioner is MUCH more efficient than resistance heating. It is called a heat pump, and requires that the Evaporator and Condenser coils of a Closed Refrigerant System be reversed.
What reverse resistance reading should diodes have when under test with an ohmmeter?
Reverse resistance should be infinite.
What is the importance of the reverse-to-forward resistance ratio of a diode?
to determine the comparison of resistance value of both forward and reverse diode . The more the resistance the lower the current , the lower the resistance the higher the current . When reverse bias , the resistance is high and it acts in open circuit and the reverse current is very small that can be neglected . When forward bias , the resistance is low and it acts as short circuit and the forward current is increasing as the voltage supply is higher .
What is the behavior of a forward and reverse biased diode?
Forward Resistance:def: It is resistance offered by diode to the forward bias is known as forward resistance.This resistance is not the same for the flow of DC as for the changing current. Accordingly this resistance is of two types :1. DC FORWARD RESISTANCE.2. AC FORWARD RESISTANCE.1. DC forward resistance: It is the opposition by diode to the DC. It is measured by the ratio of DC voltages across the diode to the resulting DC current through it.2. AC forward resistance: It is the opposition offered by the diode to the changing current. It is measured by the ratio of change in voltage across diodes to the resulting change in current through diode. The AC forward resistance is more significant as the diodes are generally used with alternating voltage.Reverse Resistance:def: The resistance offered by the diode to the reverse bias is known as Reverse Resistance. It can be DC reverse resistance or AC reverse resistance depending upon whether the reverse bias is direct or changing voltage. Idealy the reverse resistance of a diode is infinte however in practice the reverse resistance is not infinite because for any value of reverse bias, there does exist a small leakage current. It may be emphasized their that reverse resistance is very large compared to the forward resistance.These Definitions are from PRINCIPLES OF ELECTRONICS by V.K MEHTA and ROHIT MEHTA
How do you identify the polarity of a diode when the tester is on resistance scale?
ln reverse biase high resistance and in forward biase very low resistance
Why is reverse bias resistance high?
Because of high study demand
What resistance does a practical diode offer under reverse-biased conditions if the applied reverse voltage is greater than the breakdown voltage?
A normal diode with reverse voltage in excess of its rated breakdown voltage could fail. Resistance could be high (blown open) or low (shorted).
What resistance does a practical diode offer under reverse-biased conditions if the applied reverse voltage is less than the breakdown voltage?
A practical diode under reverse-biased conditions, if the applied reverse voltage is less than the breakdown voltage, will offer a high resistance, usually in excess of 10 megohms. In a practical circuit, the diode would appear to be open.
Why the resistance of forward bias is equals to zero nd resistance of reverse bias is infinite?
the junction is conducting when forward biased, approaching zero resistancethe junction is nonconducting when reverse biased, approaching infinite resistanceneither is exactly zero or infinite
Why is input resistance low and output resistance high in transistor?
The input resistance of a trasister is jst like pn junction of a diode which has a breakdown voltage of .7v for silicon and the output resistance is like a reverse bias of a diode and hence the resistance is high
What is the resistance of SCR anode and Cathode?
The resistance of a Silicon Controlled Rectifier (SCR) anode and cathode is typically very low when the SCR is in the forward conducting state, allowing current to flow easily. In the reverse state, the resistance is very high, effectively blocking current flow. The exact resistance values can vary based on the specific SCR model and operating conditions, but the general principle remains the same: low resistance in the forward direction and high resistance in the reverse direction.
When does diode acts as resistance?
When it is forward biased and, in the case of a zener diode, when it is reverse biased as well. It just is not a linear resistance type of device, and the apparent resistance changes as a function of the applied voltage or current.
Can Parachutists reduce their air resistance by increasing the size of the cross-section they present to the air?
no, the reverse, you will increase it
