1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
If $${g_E}$$ and $${g_M}$$ are the accelerations due to gravity on the surfaces of the earth and the moon respectively and if Millikan's oil drop experiment could be performed on the two surfaces, one will find the ratio
$${{electro\,\,ch\arg e\,\,on\,\,the\,\,moon} \over {electronic\,\,ch\arg e\,\,on\,\,the\,\,earth}}\,\,to\,be$$
A
$${g_M}/{g_E}$$
B
$$1$$
C
$$0$$
D
$${g_E}/{g_M}$$
2
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Photon of frequency $$v$$ has a momentum associated with it. If $$c$$ is the velocity of light, the momentum is
A
$$hv/c$$
B
$$v/c$$
C
$$h$$ $$v$$ $$c$$
D
$$hv/{c^2}$$
3
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
4
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
$${10^{ - 1}}\,s$$
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