Advertisements
Advertisements
Question
The light emitted in an LED is due to
Options
Recombination of charge carriers
Reflection of light due to lens action
Amplification of light falling at the junction
Large current capacity
Solution
Recombination of charge carriers
APPEARS IN
RELATED QUESTIONS
In a common-base connection, the emitter current is 6.28 mA and the collector current is 6.20 mA. Determine the common-base DC current gain.
Explain the need for a feedback circuit in a transistor oscillator.
Transistor functions as a switch. Explain.
A transistor having α = 0.8 is connected in common emitter configuration. When the base current changes by 6 mA, then the change in collector current is ______.
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 transistor amplifier, base-emitter junction is forward biased and collector emitter junction is reverse biased. The current gain is ______.
A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω and an output impedance of 2000Ω. The power gain of the amplifier is ______.
A conducting wire has length 'L1' and diameter 'd1'. After stretching the same wire length becomes 'L2' and diameter 'd2' The ratio of resistances before and after stretching is ______.
Explain the output characteristics of common emitter configuration of n-p-n transistor.
