1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
The de-broglie wavelength of neutrons in thermal equilibrium at temperature T is
A
$${{3.08} \over {\sqrt T }}\mathop A\limits^ \circ $$
B
$${{0.308} \over {\sqrt T }}\mathop A\limits^ \circ $$
C
$${{0.0308} \over {\sqrt T }}\mathop A\limits^ \circ $$
D
$${{30.8} \over {\sqrt T }}\mathop A\limits^ \circ $$
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
How does the Binding Energy per nucleon vary with the increase in the number of nucleons ?
A
Decrease continuously with mass number.
B
First decreases and then increases with increase in mass number.
C
First increases and then decreases with increase in mass number.
D
increases continuously with mass number.
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
An electron in hydrogen atom makes a transition n1 $$ \to $$ n2 where n1 and n2 are principal quantum numbers of the two states . Assuming Bohr's model to be valid, the time period of the electron in the initial state is eight times that in the final state. The possible values of n1 and n2 are
A
n1 = 6 and n2 = 2
B
n1 = 8 and n2 = 1
C
n1 = 8 and n2 = 2
D
n1 = 4 and n2 = 2
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
$$\alpha $$-particles, $$\beta $$-particles and $$\gamma $$-rays are all having same energy. Their penetrating power in a given medium in increasing order will be
A
$$\gamma $$, $$\alpha $$, $$\beta $$
B
$$\alpha $$, $$\beta $$, $$\gamma $$
C
$$\beta $$, $$\alpha $$, $$\gamma $$
D
$$\beta $$, $$\gamma $$, $$\alpha $$
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