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Questions and Answers
What is the effect of increasing the barrier voltage on the flow of current in a circuit?
What happens to the electrons when the barrier voltage is increased?
What is the result of increasing the barrier voltage on the displaced area?
Why do the gaps get attracted to the negative end of the battery when the barrier voltage is increased?
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What is the ultimate result of increasing the barrier voltage and displaced area?
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What happens to the resistance to the flow of current when the barrier voltage is increased?
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Why does the flow of current stop when the barrier voltage is increased?
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What is the effect of the increased displaced area on the flow of current?
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Why do the electrons get attracted to the positive end of the battery when the barrier voltage is increased?
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What is the overall effect of increasing the barrier voltage on the circuit?
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Study Notes
Applications of Diodes
The PN Junction
- A PN junction is formed by combining two types of semiconductors, negative and positive, resulting in a slope in electron concentration (dn/dx) in the negative region and a slope in gap concentration (dp/dx) in the positive region.
- This leads to the transfer of electrons to the positive region and gaps to the negative region.
The Potential Barrier
- The presence of two different charges separated by a distance creates an electric field, which in turn creates an electric potential.
- This potential barrier can be used to convert alternating voltage into continuous voltage.
Diode Rectification
- Rectification is the process of converting alternating current or voltage into direct current or voltage in one direction.
- Rectification efficiency measures the ability of the diode to maintain a constant voltage despite changes in load resistance.
- Ripple factor (γ) measures the amplitude of the AC component of the output voltage.
Forward Bias Connection
- Forward biasing a diode involves connecting the positive terminal of the battery to the P crystal and the negative terminal to the N crystal.
- This reduces the barrier voltage, allowing electrons to flow through the depletion region and pass current in the circuit.
- If the barrier voltage is increased, electrons are attracted to the positive end of the battery and gaps to the negative end, stopping the flow of current in the circuit.
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Description
This quiz covers the application of diodes in physics, specifically the PN junction, for first-year students at Al-Mustaqbal University's Department of Biochemistry.
