Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 1 (Q.No. 47)

Electronic Devices and Circuits

47.

Which of the following is true as regards photo emission?

Velocity of emitted electrons is dependent on light intensity

Rate of photo emission is inversely proportional to light intensity

Maximum velocity of electron increases with decreasing wave length

Both holes and electrons are produced

Answer: Option

Explanation:

As wavelength decreases, frequency increases and maximum velocity of electron increases.

Discussion:

6 comments Page 1 of 1.

Simran said: 6 years ago

Here, E=hf= mv^2/2.

Nav said: 7 years ago

λ = c/f.

F=c/λ c is velocity f light so if lambda decreases then 'f' increases it results to velocity increase.

Lovi said: 8 years ago

I think Lambda is inversely proportional to frequency.

MANAV said: 8 years ago

Lambda is directly proportional to velocity.

Manav said: 8 years ago

Lambda = velocity/frequency which means lambda is directly proportional to frequency. Then how do velocity increases when wavelength decreases?

Vini said: 9 years ago

V=Lambada*Frequency.

Post your comments here:

Quick links

Quantitative Aptitude

Verbal (English)

Reasoning

Programming

Interview

Placement Papers