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 significance of superstring theory?

It incorporates supersymmetry into string theory

It describes classical particles

It eliminates the need for extra dimensions

2 / 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

3 / 40

What is a fundamental string?

A hypothetical particle

The basic building block in string theory

A composite string

4 / 40

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

Type IIA has open strings

Type IIB has only closed strings

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

5 / 40

What is the Polyakov action?

An action for classical fields

An action for point particles

An action that describes the dynamics of strings

6 / 40

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

Particle field

Worldsheet

Spacetime

7 / 40

What is an open string?

A string with two distinct endpoints

A string that forms a loop

A string with one end

8 / 40

How do string interactions differ from particle interactions?

String interactions are described by worldsheet dynamics

String interactions do not exist

Particle interactions are instantaneous

9 / 40

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

They describe the shape of strings

They represent classical particles

They provide a way to compactify extra dimensions

10 / 40

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

They provide boundary conditions for open strings

They represent black holes

They describe closed strings

11 / 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

12 / 40

What is the primary goal of string theory?

To provide a unified theory of all fundamental forces

To describe atomic interactions

To explain electromagnetic waves

13 / 40

What is the role of the string coupling constant?

Determines string mass

Measures string length

Determines the strength of string interactions

14 / 40

How do strings interact in string theory?

By colliding

By joining and splitting

By merging without splitting

15 / 40

What is the role of the dilaton in string theory?

A vector field

A scalar field associated with string interactions

A massless spin-2 particle

16 / 40

What is the fundamental object in string theory?

String

Point particle

Wave

17 / 40

What is a characteristic feature of M-theory?

It unifies all five string theories

It describes only open strings

It describes only closed strings

18 / 40

What is meant by "string landscape"?

The shape of the string

The multitude of possible vacuum states in string theory

The trajectory of the string

19 / 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

20 / 40

What does "string duality" refer to?

The dual nature of strings and branes

The wave-particle duality of strings

The equivalence between different string theories

21 / 40

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

Small, unobservable spaces

Infinite, unobservable spaces

Large, observable spaces

22 / 40

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

A massless particle

A massive particle

A hypothetical faster-than-light particle

23 / 40

What is the role of supersymmetry in string theory?

Ensures stability of strings

Describes classical particles

Measures string tension

24 / 40

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

Relates large and small compactified dimensions

Measures string tension

Describes string vibrations

25 / 40

What does the term "string excitation" refer to?

The splitting of a string

The movement of a string

The different vibrational modes of a string

26 / 40

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

Photon

Electron

Graviton

27 / 40

How are black holes related to string theory?

They are described only by general relativity

They are unrelated to strings

They can be described as bound states of strings and branes

28 / 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

29 / 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

30 / 40

What is string tension?

Mass of a string

Energy per unit length of a string

Charge of a string

31 / 40

What is the purpose of compactification in string theory?

To eliminate string interactions

To reconcile higher dimensions with observable physics

To increase the number of dimensions

32 / 40

What is a closed string?

A string with open ends

A string with one end

A string that forms a loop

33 / 40

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

The scale of electromagnetic waves

The scale of atomic interactions

The scale at which gravitational effects become strong

34 / 40

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

Classical wave

Multidimensional object

Point particle

35 / 40

What is a key feature of Type I string theory?

Both open and closed strings

Only open strings

Only closed strings

36 / 40

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

Particle path

Worldline

Worldsheet

37 / 40

What is the AdS/CFT correspondence?

Correspondence between waves

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

Relation between particles

38 / 40

How are string interactions typically visualized?

Feynman diagrams

Penrose diagrams

Minkowski diagrams

39 / 40

What is a heterotic string?

A string that forms a loop

A string with one endpoint

A hybrid of two types of strings

40 / 40

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

Strings annihilating

Open strings ending on a D-brane

Closed strings merging

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