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प्रश्न
The light emitted in an LED is due to
विकल्प
Recombination of charge carriers
Reflection of light due to lens action
Amplification of light falling at the junction
Large current capacity
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उत्तर
Recombination of charge carriers
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संबंधित प्रश्न
Why is the base of a transistor made thin and is lightly doped?
In the circuit shown in the figure, the BJT has a current gain (β) of 50. For an emitter-base voltage VEB = 600 mV, calculate the emitter-collector voltage VEC (in volts).
In the symbol for a transistor, the arrow head points in the direction of the ____________.
Least doped region in a transistor ____________.
In the study of transistor as an amplifier, the ratio of collector current to emitter current is 0.98 then the ratio of collector current to base current will be ______.
In case of npn transistors, the collector current is always less than the emitter current because ______.
A common emitter amplifier circuit built using an n-p-n transistor is shown in the figure. Its DC current gain is 300, RC = 4 kΩ and VCC = 20 V. What is the minimum base current for VCE to reach saturation?
Explain the working of the n-p-n transistor in a common base configuration.
The collector current in a common-emitter transistor amplifier is 4 mA. When the base current is increased by 20 µA, the collector current increases to 6 mA. The current gain is ______.
Define α.
