1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
The anode voltage of a photocell is kept fixed. The wavelength $$\lambda $$ of the light falling on the cathode is gradually changed. The plate current $$I$$ of the photocell varies as follows :
A
JEE Main 2013 (Offline) Physics - Dual Nature of Radiation Question 148 English Option 1
B
JEE Main 2013 (Offline) Physics - Dual Nature of Radiation Question 148 English Option 2
C
JEE Main 2013 (Offline) Physics - Dual Nature of Radiation Question 148 English Option 3
D
JEE Main 2013 (Offline) Physics - Dual Nature of Radiation Question 148 English Option 4
2
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
This question has Statement 1 and Statement 2. Of the four choices given after the statements, choose the one that best describes the two statements.

Statement 1 : Davisson - Germer experiment established the wave nature of electrons.

Statement 2 : If electrons have wave nature, they can interfere and show diffraction.
A
Statement 1 is true, Statement 2 is false
B
Statement 1 is true, Statement 2 is true, Statement 2 is the correct explanation for Statement 1.
C
Statement 1 is true, Statement 2 is true, Statement 2 is not the correct explanation of Statement 1.
D
Statement 1 is false, Statement 2 is true.
3
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
This question has Statement - $$1$$ and Statement - $$2$$. Of the four choices given after the statements, choose the one that best describes the two statements.

Statement - $$1$$ : A metallic surface is irradiated by a monochromatic light of frequency $$v > {v_0}$$ (the threshold frequency). The maximum kinetic energy and the stopping potential are $${K_{\max }}$$ and $${V_0}$$ respectively. If the frequency incident on the surface is doubled, both the $${K_{\max }}$$ anmd $${V_0}$$ are also doubled.
Statement - $$2$$ : The maximum kinetic energy and the stopping potential of photoelectrons emitted from a surface are linearly dependent on the frequency of incident light.

A
Statement - $$1$$ is true, Statement - $$2$$ is true, Statement - $$2$$ is the correct explanation of Statement - $$1$$.
B
Statement - $$1$$ is true, Statement - $$2$$ is true, Statement - $$2$$ is not the correct explanation of Statement - $$1$$.
C
Statement - $$1$$ is false, Statement - $$2$$ is true.
D
Statement - $$1$$ is true, Statement - $$2$$ is false.
4
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
Statement - $$1$$ : When ultraviolet light is incident on a photocell, its stopping potential is $${V_0}$$ and the maximum kinetic energy of the photoelectrons is $${K_{\max }}$$. When the ultraviolet light is replaced by $$X$$-rays, both $${V_0}$$ and $${K_{\max }}$$ increase.

Statement - $$2$$ : Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light.

A
Statement - $$1$$ is true, Statement - $$2$$ is true; Statement - $$2$$ is the correct explanation of Statement - $$1$$
B
Statement - $$1$$ is true, Statement - $$2$$ is true; Statement - $$2$$ is not the correct explanation of Statement - $$1$$
C
Statement - $$1$$ is is false, Statement - $$2$$ is true
D
Statement - $$1$$ is is true, Statement - $$2$$ is false
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12