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 are the extra dimensions in string theory typically compactified into?

Small, unobservable spaces

Infinite, unobservable spaces

Large, observable spaces

2 / 40

How do string interactions differ from particle interactions?

Particle interactions are instantaneous

String interactions are described by worldsheet dynamics

String interactions do not exist

3 / 40

What is a heterotic string?

A string with one endpoint

A hybrid of two types of strings

A string that forms a loop

4 / 40

What is meant by "string landscape"?

The multitude of possible vacuum states in string theory

The trajectory of the string

The shape of the string

5 / 40

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

Describes string vibrations

Relates large and small compactified dimensions

Measures string tension

6 / 40

What is a fundamental string?

The basic building block in string theory

A hypothetical particle

A composite string

7 / 40

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

Strings are point-like

Strings are one-dimensional, particles are point-like

Strings have no mass

8 / 40

What is the role of the dilaton in string theory?

A scalar field associated with string interactions

A massless spin-2 particle

A vector field

9 / 40

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

A hypothetical faster-than-light particle

A massive particle

A massless particle

10 / 40

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

The space of particle positions

The space of wave functions

The space of all possible string vacua

11 / 40

What is string tension?

Energy per unit length of a string

Charge of a string

Mass of a string

12 / 40

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

The scale of atomic interactions

The scale of electromagnetic waves

The scale at which gravitational effects become strong

13 / 40

What is a key feature of Type I string theory?

Both open and closed strings

Only closed strings

Only open strings

14 / 40

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

Graviton

Electron

Photon

15 / 40

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

Type IIA has open strings

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

Type IIB has only closed strings

16 / 40

What is the AdS/CFT correspondence?

Relation between particles

Correspondence between waves

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

17 / 40

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

Worldline

Particle path

Worldsheet

18 / 40

What is an open string?

A string with two distinct endpoints

A string that forms a loop

A string with one end

19 / 40

How do strings interact in string theory?

By merging without splitting

By colliding

By joining and splitting

20 / 40

How are black holes related to string theory?

They are unrelated to strings

They can be described as bound states of strings and branes

They are described only by general relativity

21 / 40

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

They describe closed strings

They provide boundary conditions for open strings

They represent black holes

22 / 40

What does "string duality" refer to?

The dual nature of strings and branes

The equivalence between different string theories

The wave-particle duality of strings

23 / 40

What is a characteristic feature of M-theory?

It describes only open strings

It unifies all five string theories

It describes only closed strings

24 / 40

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

Closed strings merging

Open strings ending on a D-brane

Strings annihilating

25 / 40

What does the term "string excitation" refer to?

The different vibrational modes of a string

The splitting of a string

The movement of a string

26 / 40

What is a closed string?

A string with one end

A string that forms a loop

A string with open ends

27 / 40

What is a conformal field theory (CFT)?

A theory of classical mechanics

A quantum field theory that is invariant under conformal transformations

A theory of general relativity

28 / 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

29 / 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

30 / 40

How are string interactions typically visualized?

Minkowski diagrams

Penrose diagrams

Feynman diagrams

31 / 40

How are massless particles like photons represented in string theory?

As endpoints of open strings

As loops of closed strings

As vibrations of open strings

32 / 40

What is the fundamental object in string theory?

Point particle

Wave

String

33 / 40

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

Particle field

Spacetime

Worldsheet

34 / 40

What is the role of the string coupling constant?

Determines string mass

Determines the strength of string interactions

Measures string length

35 / 40

What is the Polyakov action?

An action for point particles

An action for classical fields

An action that describes the dynamics of strings

36 / 40

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

A theory of wave-particle duality

A theory of particle decay

A theory that unifies gravity and electromagnetism through extra dimensions

37 / 40

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

Point particle

Multidimensional object

Classical wave

38 / 40

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

They represent classical particles

They provide a way to compactify extra dimensions

They describe the shape of strings

39 / 40

What is the role of supersymmetry in string theory?

Ensures stability of strings

Describes classical particles

Measures string tension

40 / 40

What is the primary goal of string theory?

To describe atomic interactions

To provide a unified theory of all fundamental forces

To explain electromagnetic waves

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