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In general, transistor current gain (beta) increases by approximately 0.7% per degree centigrade above room temperature. The current gain of a heated device may be found according to:
beta(T) = beta(25 degrees C)*(1+0.007(T-25))
This is why robust circuits are designed such that there is no dependence on beta.
What else can I help you with?
What happens when current reaches saturation?
When current reaches saturation in a device like a transistor, it means the device can no longer increase the output current even if the input continues to increase. This generally indicates that the device has reached its maximum current-carrying capacity and can lead to distortion in the output signal.
Should an acid-test ratio increase or decrease?
An acid-test ratio should typically increase over time. An increase in the acid-test ratio indicates that a company has more liquid assets relative to current liabilities, which is generally a positive sign of financial health and liquidity.
Explain does the reverse saturation current change with temperature or not?
Yes it does. Is (sat current) actually increases with an increase in temperature as it is a minority carrier phenomenon. The concentration of minority carriers is dependent on the breaking of the covalent bonds. One way this can happen is through thermal ionization. (Elec. Engg Semiconductor POV)
Does electrolysis occur at the room temperature?
Electrolysis typically occurs at room temperature, as it is a process that involves the use of an electric current to drive a non-spontaneous chemical reaction. However, the rate of electrolysis may be influenced by temperature, as higher temperatures can increase reaction rates.
Why electrical conductivity of metals decrease with increase in temperature?
The reason for this very behaviour of metals is explained by the fact that at random, the free electrons moving in a metallic object (say wire) also collide with the atoms contained in the wire. Due to these collisions, their kinetic energy is wasted to some extent. When the temperature of such a metallic wire is increased, their collisions with the containing atoms become more frequent and ultimately more energy is wasted. This obviously reduce their thermal and electrical conductivity.
What is the difference between capacitor and transistor?
transistor either increase or decrease current bt capacitor stores the energy
What happens when the base current of a transistor is decrease?
in a properly biased transistor, collector and emitter current also decrease
What is the effect of temperature on transistor?
conductivity of semiconductors increases with increase in temperature as breakdown of covalent bonds take place in the semiconductor due to increase in temp but more & more increase in the temp may result in the breakdown or damage of the semiconductor which results in the decrease in conductivity of semiconductor
What cause transistor collector current to increase when its warming up?
The forward current of any semiconductor device is dependent on temperature. This can cause collector current to increase in an uncompensated circuit. In the worst case, this can cause thermal runaway, and failure of the device. Often, we compensate for temperature by placing biasing limits on the demand for the transistor's gain.
How is current amplified in a transistor?
Transistor increase the strength of a weak signal from the base
What is the source of leakage current in a transistor?
The current of the minority charges (collector region) is the source of the leakage current. At higher temperature, this leakage current increases due to increase in thermal energy.
Does the magnetic field increase or decrease if the current is decreased?
An increase in an electrical current will cause magnetism to increase but a decrease in an electrical current will cause magnetism to decrease.
Does the current ina circuit increase with increase in temperature?
Resistance increases as temperature increases. If Voltage is held constant then according to Ohm's Law Voltage = Current x Resistance then current would decrease as resistance increases.
When a transistor is used as an amplifier increasing the base current will cause an increase in?
Increasing base current causes a proportionate increase in collector current - proportionate to hFe, unless the transistor is operated outside of linear mode.
In which op collector current of transistor remains constant in spite of increase in base current is?
ethiyopia
Can you list three ways you can change the current in a circuit?
Increase, decrease, or remove the load <<>> Change the voltage and the current will also change in direct proportion, Ohms law.
Will the resistance of a copper conductor decrease with an increase in the applied voltage?
If all environmental conditions remain constant then the resistance will not change appreciably with applied voltage, but the current will increase. An increase in current will raise the temperature of the conductor which will increase the resistance somewhat.
