1
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
The threshold frequency for a metallic surface corresponds to an energy of $$6.2$$ $$eV$$ and the stopping potential for a radiation incident on this surface is $$5V.$$ The incident radiation lies in
A
ultra-violet region
B
infra-red region
C
visible region
D
$$x$$-ray region
2
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
The time taken by a photoelectron to come out after the photon strikes is approximately
A
$${10^{ - 4}}\,s$$
B
$${10^{ - 10}}\,s$$
C
$${10^{ - 16}}\,s$$
D
$${10^{ - 1}}\,s$$
3
AIEEE 2006
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 $${\rm I}$$ of the photocell varies as follows
A
AIEEE 2006 Physics - Dual Nature of Radiation Question 147 English Option 1
B
AIEEE 2006 Physics - Dual Nature of Radiation Question 147 English Option 2
C
AIEEE 2006 Physics - Dual Nature of Radiation Question 147 English Option 3
D
AIEEE 2006 Physics - Dual Nature of Radiation Question 147 English Option 4
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
If the kinetic energy of a free electron doubles, it's deBroglie wavelength changes by the factor
A
$$2$$
B
$${1 \over 2}$$
C
$${\sqrt 2 }$$
D
$${1 \over {\sqrt 2 }}$$
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