W = hf?
hf = W + E
E = hf = hc/?
62) The work function of a metal is 4eV. To emit photoelectrons with zero velocity from this, the wavelength of incident radiation must be
Answer is:
1300A
Explanation:
Related Electronic Devices and Communication MCQ with Answers
Answer is:
230 V 50 Hz
Explanation:
Domestic power supply in India is 230 V 50 Hz
Answer is:
intrinsic semiconductor
Explanation:
In a semiconductor crystal, if current flows due to breakage of crystal bonds, then the semiconductor is called intrinsic semiconductor
Answer is:
number of electrons and holes increases equally
Explanation:
When n ?type of semiconductor is heated number of electrons and holes increases equally
Answer is:
20 mA
Explanation:
ALPHA (?):?It is a large signal current gain in common base configuration. It is the ratio of collector current (output current) to the emitter current (input current).It is a current gain in CB amplifier and it indicates that the amount of emitter current reaching to collector. Its value is unity ideally and practically less than unity. Beta (?): It is a current gain factor in the common emitter configuration. It is the ration of collector current (output current) to base current (output current).