1
AIEEE 2008
+4
-1
This question contains Statement- 1 and Statement- 2. Of the four choices given after the statements, choose the one that best describes the two statements:
Statement- 1:
Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion and

Statement- 2:
For heavy nuclei, binding energy per nucleon increases with increasing $$Z$$ while for light nuclei it decreases with increasing $$Z.$$

A
Statement - $$1$$ is false, Statement - $$2$$ is true
B
Statement - $$1$$ is true, Statement - $$2$$ is true; Statement - $$2$$ is a correct explanation for Statement - $$1$$
C
Statement - $$1$$ is true, Statement - $$2$$ is true; Statement - $$2$$ is not a correct explanation for Statement - $$1$$
D
Statement - $$1$$ is true, Statement - $$2$$ is false
2
AIEEE 2008
+4
-1
Suppose an electron is attracted towards the origin by a force $${k \over r}$$ where $$'k'$$ is a constant and $$'r'$$ is the distance of the electron from the origin. By applying Bohr model to this system, the radius of the $${n^{th}}$$ orbital of the electron is found to be $$'{r_n}'$$ and the kinetic energy of the electron to be $$'{T_n}'.$$

Then which of the following is true?

A
$${T_n} \propto {1 \over {{n^2}}},{r_n} \propto {n^2}$$
B
$${T_n}$$ independent of $$n,{r_n} \propto n$$
C
$${T_n} \propto {1 \over n},{r_n} \propto n$$
D
$${T_n} \propto {1 \over n},{r_n} \propto {n^2}$$
3
AIEEE 2007
+4
-1
If $${M_O}$$ is the mass of an oxygen isotope $${}_8{O^{17}}$$ , $${M_p}$$ and $${M_N}$$ are the masses of a proton and neutron respectively, the nuclear binding energy of the isotope is
A
$$\left( {{M_O} - 17{M_N}} \right){C^2}$$
B
$$\left( {{M_O} - 8{M_P}} \right){C^2}$$
C
$$\left( {{M_O} - 8{M_P} - 9{M_N}} \right){C^2}$$
D
$${{M_O}{c^2}}$$
4
AIEEE 2007
+4
-1
Out of Syllabus
In gamma ray emission from a nucleus
A
only the proton number changes
B
both the neutron number and the proton number change
C
there is no change in the proton number and the neutron number
D
only the neutron number changes
EXAM MAP
Medical
NEET