Electromagnetic Fields and Waves MCQs (Part-2)

What is the unit of electric field intensity?

A Tesla
B Ampere
C Volt per meter (V/m)
D Ohm

Which law is used to describe the relationship between the electric field and charge?

A Faraday’s Law
B Gauss’s Law
C Ampere’s Law
D Biot-Savart Law

What does the term “wave propagation” refer to?

A The movement of electrons in a conductor
B The transfer of energy through space by electromagnetic waves
C The flow of electric current through a conductor
D The reflection of waves at boundaries

What does Maxwell’s First Equation describe?

A The relationship between magnetic fields and electric currents
B The relationship between electric fields and charge distributions
C The relationship between electric fields and time-varying magnetic fields
D The relationship between electric fields and electric potentials

What is the principle behind electromagnetic wave transmission?

A Energy transfer due to electric current
B Energy transfer due to electric and magnetic fields oscillating perpendicular to each other
C Energy transfer due to magnetic fields alone
D Energy transfer due to heat conduction

What is the term for the bending of waves around obstacles or through openings?

A Diffraction
B Refraction
C Reflection
D Polarization

Which of the following is a property of a good electromagnetic wave conductor?

A High resistance
B Low permeability
C High conductivity
D High permittivity

Which law explains how a time-varying magnetic field induces an electric field?

A Ampere’s Law
B Faraday’s Law
C Gauss’s Law
D Biot-Savart Law

What is the oscillation of electric fields in a specific direction called?

A Diffraction
B Polarization
C Refraction
D Reflection

What is the main function of a waveguide in electromagnetic systems?

A To amplify electromagnetic waves
B To guide electromagnetic waves along a specific path
C To convert electromagnetic energy to heat
D To polarize electromagnetic waves

In the context of electromagnetic interference (EMI), what does shielding prevent?

A The flow of current in a circuit
B The transmission of unwanted electromagnetic waves
C The distortion of wave propagation
D The absorption of electromagnetic waves

What is the primary purpose of a resonant cavity?

A To store electric charge
B To store electromagnetic energy at a specific frequency
C To store magnetic flux
D To dissipate electromagnetic energy

What does the permeability of a material indicate?

A The material’s ability to conduct electric current
B The material’s ability to resist magnetic fields
C The material’s ability to support the formation of a magnetic field
D The material’s resistance to electromagnetic radiation

What is the phenomenon of reflection in wave behavior?

A The bending of waves as they pass through a medium
B The bouncing back of waves from a surface
C The spreading of waves when they pass through an opening
D The polarization of waves in a medium

What is the energy carried by an electromagnetic wave proportional to?

A The frequency of the wave
B The amplitude of the wave
C The speed of the wave
D The wavelength of the wave

What does the magnetic field intensity represent?

A The force per unit charge in a magnetic field
B The strength of the magnetic field at a point in space
C The energy density of a magnetic field
D The power transmitted by a magnetic field

Which property of a material affects the speed of electromagnetic waves through it?

A Permeability
B Electric charge density
C Conductivity
D Permittivity

What is the relationship between wavelength and frequency in an electromagnetic wave?

A Wavelength is directly proportional to frequency
B Wavelength is inversely proportional to frequency
C Wavelength is equal to frequency
D Wavelength is unrelated to frequency

What is the main purpose of the displacement current in Maxwell’s equations?

A To account for magnetic fields in conductors
B To describe time-varying electric fields
C To calculate the electric charge density
D To determine the power loss in a material

What is the effect of increasing frequency on the skin effect in conductors?

A It reduces the skin depth
B It increases the skin depth
C It has no effect on skin depth
D It increases the conductivity of the material