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Important Questions on Nuclei

HARD

Physics>Modern Physics>Nuclei>Nuclear Force

What are nuclear forces? Write their properties.

MEDIUM

Physics>Modern Physics>Nuclei>Nuclear Force

A hydrogen molecule has two protons and two electrons. In discussing behaviour of the hydrogen molecule the nuclear force between these protons is always ignored, why?

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Two protons are kept at a separation of

50 \overset{\circ}{A}

. If

F_{n}

is the nuclear force and

F_{e}

is the electrostatic force between them, then,

HARD

Physics>Modern Physics>Nuclei>Nuclear Force

Explain in detail the four fundamental forces.

MEDIUM

Physics>Modern Physics>Nuclei>Nuclear Force

Write any two properties of the nuclear forces?

MEDIUM

Physics>Modern Physics>Nuclei>Nuclear Force

Before the neutrino hypothesis, the beta decay process was thought to be the transition,

n \to p + \bar{e}

If this was true, show that if the neutron was at rest, the proton and electron would emerge with fixed energies and calculate them. Experimentally, the electron energy was found to have a large range.

MEDIUM

Physics>Modern Physics>Nuclei>Nuclear Force

Nuclear force exists between

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

A force between two protons is same as the force between proton and neutron. The nature of the force is

MEDIUM

Physics>Modern Physics>Nuclei>Nuclear Force

Describe composition of the nucleus and discuss nuclear forces?

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Heavy stable nucleus have more neutrons than protons. This is because of the fact that

HARD

Physics>Modern Physics>Nuclei>Nuclear Force

Briefly explain the elementary particles of nature.

MEDIUM

Physics>Modern Physics>Nuclei>Nuclear Force

The nuclear forces are

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Why do stable nuclei never have more protons than neutrons?

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Explain in detail the nuclear force.

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

For a nucleus to be stable, the correct relation between neutron number

N

and proton number

Z

is,

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Two protons are separated by

10 Å

. Let

F_{n}

and

F_{e}

be the nuclear force and electrostatic force between them, so

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Let

F_{p p}, F_{p n}

and

F_{n n}

denote the magnitudes of the net force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. Neglect gravitational force. When the separation is

1 fm

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Two nucleons are at a separation of

1 \times 10^{- 15} m

. The net force(nuclear) between them is

F_{1}

if both are neutrons,

F_{2}

if both are protons and

F_{3}

if one is a proton and other is a neutron. In such a case,

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Fusion processes, like combining two deuterons to form a

He

nucleus are impossible at ordinary temperatures and pressure. The reasons for this can be traced to the fact:

EASY

Physics>Modern Physics>Nuclei>Nuclear Force

Out of gravitational, electrostatic, Van Der Waals and nuclear forces, which are able to provide attractive force between two neutrons

Which Purana is associated with the worship of Vishnu?

Important Questions on Nuclei

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