String Interactions MCQs with Answers

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String Interactions Online Quiz

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• Test Name: String Interactions MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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String Interactions

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1 / 40

What is the fundamental object in string theory?

Point particle

Wave

String

2 / 40

What is the Polyakov action?

An action for point particles

An action that describes the dynamics of strings

An action for classical fields

3 / 40

What does the term "moduli space" refer to in string theory?

The space of particle positions

The space of all possible string vacua

The space of wave functions

4 / 40

What is the importance of the Planck scale in string theory?

The scale at which gravitational effects become strong

The scale of electromagnetic waves

The scale of atomic interactions

5 / 40

What is the primary goal of string theory?

To describe atomic interactions

To explain electromagnetic waves

To provide a unified theory of all fundamental forces

6 / 40

What is the AdS/CFT correspondence?

Relation between particles

A duality between string theory in AdS space and a CFT on its boundary

Correspondence between waves

7 / 40

What is the role of supersymmetry in string theory?

Describes classical particles

Ensures stability of strings

Measures string tension

8 / 40

What does the term "tachyon" refer to in string theory?

A massive particle

A hypothetical faster-than-light particle

A massless particle

9 / 40

What is the role of Calabi-Yau manifolds in string theory?

They represent classical particles

They describe the shape of strings

They provide a way to compactify extra dimensions

10 / 40

What is a conformal field theory (CFT)?

A theory of general relativity

A theory of classical mechanics

A quantum field theory that is invariant under conformal transformations

11 / 40

What does "string duality" refer to?

The equivalence between different string theories

The wave-particle duality of strings

The dual nature of strings and branes

12 / 40

What type of string interaction can lead to the formation of a D-brane?

Open strings ending on a D-brane

Strings annihilating

Closed strings merging

13 / 40

What is the role of the dilaton in string theory?

A scalar field associated with string interactions

A vector field

A massless spin-2 particle

14 / 40

What is a key feature of Type I string theory?

Both open and closed strings

Only closed strings

Only open strings

15 / 40

What is the term for the space where strings move and interact?

Worldsheet

Spacetime

Particle field

16 / 40

What is the significance of T-duality in string theory?

Describes string vibrations

Relates large and small compactified dimensions

Measures string tension

17 / 40

What is the primary difference between Type IIA and Type IIB string theory?

Type IIB has only closed strings

Type IIA has open strings

Type IIA has non-chiral fermions, Type IIB has chiral fermions

18 / 40

What is the significance of D-branes in string theory?

They represent black holes

They describe closed strings

They provide boundary conditions for open strings

19 / 40

What are the extra dimensions in string theory typically compactified into?

Small, unobservable spaces

Large, observable spaces

Infinite, unobservable spaces

20 / 40

What is an open string?

A string that forms a loop

A string with two distinct endpoints

A string with one end

21 / 40

What is a heterotic string?

A string that forms a loop

A hybrid of two types of strings

A string with one endpoint

22 / 40

What is the term for the 2D surface traced out by a string in spacetime?

Worldsheet

Particle path

Worldline

23 / 40

What is meant by "string landscape"?

The shape of the string

The trajectory of the string

The multitude of possible vacuum states in string theory

24 / 40

How are black holes related to string theory?

They are unrelated to strings

They are described only by general relativity

They can be described as bound states of strings and branes

25 / 40

What is the role of the string coupling constant?

Determines string mass

Determines the strength of string interactions

Measures string length

26 / 40

How are massless particles like photons represented in string theory?

As endpoints of open strings

As vibrations of open strings

As loops of closed strings

27 / 40

What is a fundamental string?

A composite string

The basic building block in string theory

A hypothetical particle

28 / 40

What is a characteristic feature of M-theory?

It describes only open strings

It describes only closed strings

It unifies all five string theories

29 / 40

What is string tension?

Charge of a string

Energy per unit length of a string

Mass of a string

30 / 40

What is the significance of superstring theory?

It incorporates supersymmetry into string theory

It eliminates the need for extra dimensions

It describes classical particles

31 / 40

What does the term "string excitation" refer to?

The movement of a string

The splitting of a string

The different vibrational modes of a string

32 / 40

How are string interactions typically visualized?

Penrose diagrams

Feynman diagrams

Minkowski diagrams

33 / 40

What is a closed string?

A string with one end

A string that forms a loop

A string with open ends

34 / 40

How do strings interact in string theory?

By merging without splitting

By colliding

By joining and splitting

35 / 40

How do string interactions differ from particle interactions?

String interactions do not exist

String interactions are described by worldsheet dynamics

Particle interactions are instantaneous

36 / 40

What is the purpose of compactification in string theory?

To reconcile higher dimensions with observable physics

To eliminate string interactions

To increase the number of dimensions

37 / 40

What kind of particle does a closed string represent in string theory?

Photon

Graviton

Electron

38 / 40

What does the term "brane" refer to in string theory?

Multidimensional object

Point particle

Classical wave

39 / 40

What is the Kaluza-Klein theory related to string theory?

A theory of wave-particle duality

A theory that unifies gravity and electromagnetism through extra dimensions

A theory of particle decay

40 / 40

How do strings in string theory differ from particles in quantum field theory?

Strings have no mass

Strings are one-dimensional, particles are point-like

Strings are point-like

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