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

The space of wave functions

The space of all possible string vacua

The space of particle positions

2 / 40

What is a heterotic string?

A hybrid of two types of strings

A string that forms a loop

A string with one endpoint

3 / 40

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

They provide a way to compactify extra dimensions

They describe the shape of strings

They represent classical particles

4 / 40

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

Strings are one-dimensional, particles are point-like

Strings have no mass

Strings are point-like

5 / 40

What is the primary goal of string theory?

To explain electromagnetic waves

To describe atomic interactions

To provide a unified theory of all fundamental forces

6 / 40

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

Type IIB has only closed strings

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

Type IIA has open strings

7 / 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

8 / 40

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

They provide boundary conditions for open strings

They describe closed strings

They represent black holes

9 / 40

How are string interactions typically visualized?

Penrose diagrams

Minkowski diagrams

Feynman diagrams

10 / 40

What is the Polyakov action?

An action that describes the dynamics of strings

An action for point particles

An action for classical fields

11 / 40

How do strings interact in string theory?

By joining and splitting

By colliding

By merging without splitting

12 / 40

What is the significance of superstring theory?

It describes classical particles

It eliminates the need for extra dimensions

It incorporates supersymmetry into string theory

13 / 40

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

The scale of electromagnetic waves

The scale at which gravitational effects become strong

The scale of atomic interactions

14 / 40

How are massless particles like photons represented in string theory?

As loops of closed strings

As endpoints of open strings

As vibrations of open strings

15 / 40

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

Classical wave

Multidimensional object

Point particle

16 / 40

What is an open string?

A string with two distinct endpoints

A string with one end

A string that forms a loop

17 / 40

What is the role of supersymmetry in string theory?

Ensures stability of strings

Measures string tension

Describes classical particles

18 / 40

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

Relates large and small compactified dimensions

Describes string vibrations

Measures string tension

19 / 40

What is the purpose of compactification in string theory?

To reconcile higher dimensions with observable physics

To increase the number of dimensions

To eliminate string interactions

20 / 40

What does the term "string excitation" refer to?

The movement of a string

The different vibrational modes of a string

The splitting of a string

21 / 40

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

Particle field

Worldsheet

Spacetime

22 / 40

What is string tension?

Energy per unit length of a string

Charge of a string

Mass of a string

23 / 40

What is the role of the dilaton in string theory?

A massless spin-2 particle

A scalar field associated with string interactions

A vector field

24 / 40

How do string interactions differ from particle interactions?

String interactions are described by worldsheet dynamics

Particle interactions are instantaneous

String interactions do not exist

25 / 40

What is the role of the string coupling constant?

Measures string length

Determines the strength of string interactions

Determines string mass

26 / 40

What is the fundamental object in string theory?

Wave

String

Point particle

27 / 40

What is a key feature of Type I string theory?

Only closed strings

Only open strings

Both open and closed strings

28 / 40

What is a characteristic feature of M-theory?

It describes only closed strings

It unifies all five string theories

It describes only open strings

29 / 40

What is a closed string?

A string with one end

A string with open ends

A string that forms a loop

30 / 40

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

A hypothetical faster-than-light particle

A massless particle

A massive particle

31 / 40

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

Small, unobservable spaces

Infinite, unobservable spaces

Large, observable spaces

32 / 40

What does "string duality" refer to?

The equivalence between different string theories

The dual nature of strings and branes

The wave-particle duality of strings

33 / 40

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

A theory that unifies gravity and electromagnetism through extra dimensions

A theory of particle decay

A theory of wave-particle duality

34 / 40

What is a conformal field theory (CFT)?

A quantum field theory that is invariant under conformal transformations

A theory of general relativity

A theory of classical mechanics

35 / 40

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

Particle path

Worldline

Worldsheet

36 / 40

What is a fundamental string?

A composite string

A hypothetical particle

The basic building block in string theory

37 / 40

What is meant by "string landscape"?

The multitude of possible vacuum states in string theory

The shape of the string

The trajectory of the string

38 / 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

39 / 40

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

Electron

Graviton

Photon

40 / 40

How are black holes related to string theory?

They can be described as bound states of strings and branes

They are unrelated to strings

They are described only by general relativity

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