147542
The angular momentum of an electron in first orbit of $\mathrm{Li}^{++}$ion is-
1 $\frac{3 h}{2 \pi}$
2 $\frac{9 \mathrm{~h}}{2 \pi}$
3 $\frac{\mathrm{h}}{2 \pi}$
4 $\frac{\mathrm{h}}{6 \pi}$
Explanation:
C We know that Angular momentum $(\mathrm{L})=\frac{\mathrm{nh}}{2 \pi}$ For first orbit of $\mathrm{Li}^{++}$ion $\mathrm{n}=1$ $\mathrm{mvr}=\frac{\mathrm{nh}}{2 \pi}$ $\mathrm{mvr}=\frac{\mathrm{h}}{2 \pi}$
BITSAT- 2007
NUCLEAR PHYSICS
147545
The operation of a nuclear reactor is said to be critical, if the multiplication factor (k) has a value :
1 1
2 1.5
3 2.1
4 2.5
Explanation:
A If multiplication factor $\mathrm{k}=1$, the operation of nuclear reactor is said to be critical. The multiplication factor $=\frac{\text { rate of production of neutron } \$}{\text { rate of loss of neutrons }}$ if $\mathrm{k}>1$ Explosion takes place If $\mathrm{k} \lt 1$ The chain reaction comes to half.
JCECE-2007
NUCLEAR PHYSICS
147546
Two nucleons are at a separation of 1 fermi. The net force between them is $F_{1}$, if both are neutrons $F_{2}$, if both are protons and $F_{3}$, if one is a proton and the other is neutron.
1 $\mathrm{F}_{1}>\mathrm{F}_{2}>\mathrm{F}_{3}$
2 $\mathrm{F}_{2}>\mathrm{F}_{1}>\mathrm{F}_{3}$
3 $\mathrm{F}_{1}=\mathrm{F}_{3}>\mathrm{F}_{2}$
4 $\mathrm{F}_{1}=\mathrm{F}_{2}>\mathrm{F}_{3}$
Explanation:
C Nuclear forces are the strongest forces in nature. Nuclear forces are the strong forces of attraction which hold together the nuclear (neutrons and protons) in the tiny nucleus of an atom. In spite of strong electrostatic force of repulsion between protons. Nuclear force act in pair with the same strength. It shows that nuclear forces are independent of change. The attractive nuclear force is the same for any pair of nucleons. Thus $\mathrm{F}_{1}=\mathrm{F}_{3}$ when there are no electrostatic forces but $\mathrm{F}_{2}=$ attractive nuclear force repulsive electrostatic force. So, $\mathrm{F}_{1}=\mathrm{F}_{3}>\mathrm{F}_{2}$
MHT-CET 2006
NUCLEAR PHYSICS
147533
Which of the following forces has the highest strength
147542
The angular momentum of an electron in first orbit of $\mathrm{Li}^{++}$ion is-
1 $\frac{3 h}{2 \pi}$
2 $\frac{9 \mathrm{~h}}{2 \pi}$
3 $\frac{\mathrm{h}}{2 \pi}$
4 $\frac{\mathrm{h}}{6 \pi}$
Explanation:
C We know that Angular momentum $(\mathrm{L})=\frac{\mathrm{nh}}{2 \pi}$ For first orbit of $\mathrm{Li}^{++}$ion $\mathrm{n}=1$ $\mathrm{mvr}=\frac{\mathrm{nh}}{2 \pi}$ $\mathrm{mvr}=\frac{\mathrm{h}}{2 \pi}$
BITSAT- 2007
NUCLEAR PHYSICS
147545
The operation of a nuclear reactor is said to be critical, if the multiplication factor (k) has a value :
1 1
2 1.5
3 2.1
4 2.5
Explanation:
A If multiplication factor $\mathrm{k}=1$, the operation of nuclear reactor is said to be critical. The multiplication factor $=\frac{\text { rate of production of neutron } \$}{\text { rate of loss of neutrons }}$ if $\mathrm{k}>1$ Explosion takes place If $\mathrm{k} \lt 1$ The chain reaction comes to half.
JCECE-2007
NUCLEAR PHYSICS
147546
Two nucleons are at a separation of 1 fermi. The net force between them is $F_{1}$, if both are neutrons $F_{2}$, if both are protons and $F_{3}$, if one is a proton and the other is neutron.
1 $\mathrm{F}_{1}>\mathrm{F}_{2}>\mathrm{F}_{3}$
2 $\mathrm{F}_{2}>\mathrm{F}_{1}>\mathrm{F}_{3}$
3 $\mathrm{F}_{1}=\mathrm{F}_{3}>\mathrm{F}_{2}$
4 $\mathrm{F}_{1}=\mathrm{F}_{2}>\mathrm{F}_{3}$
Explanation:
C Nuclear forces are the strongest forces in nature. Nuclear forces are the strong forces of attraction which hold together the nuclear (neutrons and protons) in the tiny nucleus of an atom. In spite of strong electrostatic force of repulsion between protons. Nuclear force act in pair with the same strength. It shows that nuclear forces are independent of change. The attractive nuclear force is the same for any pair of nucleons. Thus $\mathrm{F}_{1}=\mathrm{F}_{3}$ when there are no electrostatic forces but $\mathrm{F}_{2}=$ attractive nuclear force repulsive electrostatic force. So, $\mathrm{F}_{1}=\mathrm{F}_{3}>\mathrm{F}_{2}$
MHT-CET 2006
NUCLEAR PHYSICS
147533
Which of the following forces has the highest strength
147542
The angular momentum of an electron in first orbit of $\mathrm{Li}^{++}$ion is-
1 $\frac{3 h}{2 \pi}$
2 $\frac{9 \mathrm{~h}}{2 \pi}$
3 $\frac{\mathrm{h}}{2 \pi}$
4 $\frac{\mathrm{h}}{6 \pi}$
Explanation:
C We know that Angular momentum $(\mathrm{L})=\frac{\mathrm{nh}}{2 \pi}$ For first orbit of $\mathrm{Li}^{++}$ion $\mathrm{n}=1$ $\mathrm{mvr}=\frac{\mathrm{nh}}{2 \pi}$ $\mathrm{mvr}=\frac{\mathrm{h}}{2 \pi}$
BITSAT- 2007
NUCLEAR PHYSICS
147545
The operation of a nuclear reactor is said to be critical, if the multiplication factor (k) has a value :
1 1
2 1.5
3 2.1
4 2.5
Explanation:
A If multiplication factor $\mathrm{k}=1$, the operation of nuclear reactor is said to be critical. The multiplication factor $=\frac{\text { rate of production of neutron } \$}{\text { rate of loss of neutrons }}$ if $\mathrm{k}>1$ Explosion takes place If $\mathrm{k} \lt 1$ The chain reaction comes to half.
JCECE-2007
NUCLEAR PHYSICS
147546
Two nucleons are at a separation of 1 fermi. The net force between them is $F_{1}$, if both are neutrons $F_{2}$, if both are protons and $F_{3}$, if one is a proton and the other is neutron.
1 $\mathrm{F}_{1}>\mathrm{F}_{2}>\mathrm{F}_{3}$
2 $\mathrm{F}_{2}>\mathrm{F}_{1}>\mathrm{F}_{3}$
3 $\mathrm{F}_{1}=\mathrm{F}_{3}>\mathrm{F}_{2}$
4 $\mathrm{F}_{1}=\mathrm{F}_{2}>\mathrm{F}_{3}$
Explanation:
C Nuclear forces are the strongest forces in nature. Nuclear forces are the strong forces of attraction which hold together the nuclear (neutrons and protons) in the tiny nucleus of an atom. In spite of strong electrostatic force of repulsion between protons. Nuclear force act in pair with the same strength. It shows that nuclear forces are independent of change. The attractive nuclear force is the same for any pair of nucleons. Thus $\mathrm{F}_{1}=\mathrm{F}_{3}$ when there are no electrostatic forces but $\mathrm{F}_{2}=$ attractive nuclear force repulsive electrostatic force. So, $\mathrm{F}_{1}=\mathrm{F}_{3}>\mathrm{F}_{2}$
MHT-CET 2006
NUCLEAR PHYSICS
147533
Which of the following forces has the highest strength
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
NUCLEAR PHYSICS
147542
The angular momentum of an electron in first orbit of $\mathrm{Li}^{++}$ion is-
1 $\frac{3 h}{2 \pi}$
2 $\frac{9 \mathrm{~h}}{2 \pi}$
3 $\frac{\mathrm{h}}{2 \pi}$
4 $\frac{\mathrm{h}}{6 \pi}$
Explanation:
C We know that Angular momentum $(\mathrm{L})=\frac{\mathrm{nh}}{2 \pi}$ For first orbit of $\mathrm{Li}^{++}$ion $\mathrm{n}=1$ $\mathrm{mvr}=\frac{\mathrm{nh}}{2 \pi}$ $\mathrm{mvr}=\frac{\mathrm{h}}{2 \pi}$
BITSAT- 2007
NUCLEAR PHYSICS
147545
The operation of a nuclear reactor is said to be critical, if the multiplication factor (k) has a value :
1 1
2 1.5
3 2.1
4 2.5
Explanation:
A If multiplication factor $\mathrm{k}=1$, the operation of nuclear reactor is said to be critical. The multiplication factor $=\frac{\text { rate of production of neutron } \$}{\text { rate of loss of neutrons }}$ if $\mathrm{k}>1$ Explosion takes place If $\mathrm{k} \lt 1$ The chain reaction comes to half.
JCECE-2007
NUCLEAR PHYSICS
147546
Two nucleons are at a separation of 1 fermi. The net force between them is $F_{1}$, if both are neutrons $F_{2}$, if both are protons and $F_{3}$, if one is a proton and the other is neutron.
1 $\mathrm{F}_{1}>\mathrm{F}_{2}>\mathrm{F}_{3}$
2 $\mathrm{F}_{2}>\mathrm{F}_{1}>\mathrm{F}_{3}$
3 $\mathrm{F}_{1}=\mathrm{F}_{3}>\mathrm{F}_{2}$
4 $\mathrm{F}_{1}=\mathrm{F}_{2}>\mathrm{F}_{3}$
Explanation:
C Nuclear forces are the strongest forces in nature. Nuclear forces are the strong forces of attraction which hold together the nuclear (neutrons and protons) in the tiny nucleus of an atom. In spite of strong electrostatic force of repulsion between protons. Nuclear force act in pair with the same strength. It shows that nuclear forces are independent of change. The attractive nuclear force is the same for any pair of nucleons. Thus $\mathrm{F}_{1}=\mathrm{F}_{3}$ when there are no electrostatic forces but $\mathrm{F}_{2}=$ attractive nuclear force repulsive electrostatic force. So, $\mathrm{F}_{1}=\mathrm{F}_{3}>\mathrm{F}_{2}$
MHT-CET 2006
NUCLEAR PHYSICS
147533
Which of the following forces has the highest strength
