The photocurrent in an experiment on photoelectric effect increases if
The intensity of the source is decreased
The intensity of the source is increased
The exposure time is increased
The exposure time is decreased.
A
The exposure time is decreased.
B
The intensity of the source is increased
C
The exposure time is increased
D
The intensity of the source is decreased
Open in App
Solution
Verified by Toppr
Increasing the intensity while keeping frequency fixed increases the number of photons hitting the metal and hence it increases the rate at which electrons are emitted. In turn the photocurrent increases.
So, the answer is option (A).
Was this answer helpful?
0
Similar Questions
Q1
The photo current in an experiment on photoelectric effect increases if
(a) the intensity of the source is increased
(b) the exposure time is increased
(c) the intensity of the source is decreased
(d) the exposure time is decreased
View Solution
Q2
The photocurrent in an experiment on photoelectric effect increases if
View Solution
Q3
In a photoelectric experiment, intensity of a light source is doubled while its frequency is kept the same. Then consider the following statements.
(i) The saturation photocurrent remains almost the same.
(ii) The maximum kinetic energy of the photoelectrons is doubled.
View Solution
Q4
A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photocurrent 'I' with distance 'd' of the source from the emitter:
View Solution
Q5
The time of exposure is 4 s to print a photograph from a negative when source is 1 m away. If the source is placed 0.5 m away the time of exposure will be