The sensitivity of human eyes is maximum at
A. White portion of spectrum
B. Green portion of spectrum
C. Red portion of spectrum
D. Violet portion of spectrum
Answer: Option B
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The forbidden energy gap between the valence band and conduction band will be least in case of
A. Metals
B. Semiconductors
C. Insulators
D. All of the above
For a NPN bipolar transistor, what is the main stream of current in the base region?
A. Drift of holes
B. Diffusion of holes
C. Drift of electrons
D. Diffusion of electrons
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true
For a P-N diode, the number of minority carriers crossing the junction depends on
A. Forward bias voltage
B. Potential barrier
C. Rate of thermal generation of electron hole pairs
D. None of the above
Human eye is most sensitive at a wavelength of 555nm(under daylight condition).green light at this produces the impression of highest brightness when compared to light at other wavelength
How?