Electromagnetic Fields and Waves MCQs (Part-11)

What is the main component in a magnetic circuit?

A Magnetic field
B Electric current
C Magnetic flux
D Electric field

What does inductance measure in a circuit?

A Ability to store energy
B Resistance
C Voltage
D Magnetic field strength

How does increasing the number of turns in a coil affect inductance?

A Decreases inductance
B Increases inductance
C No effect
D Changes resistance

What happens when a changing magnetic field induces a current in a conductor?

A Magnetic flux linkage
B Increased resistance
C Decreased flux
D Induced voltage

What is flux linkage in the context of inductance?

A Magnetic field strength
B Magnetic field lines
C The total flux through a coil
D Magnetic permeability

How is inductance related to the rate of change of current in a circuit?

A Directly proportional
B Inversely proportional
C Unrelated
D Exponentially proportional

What happens when a magnetic flux is cut by a conductor?

A Electromagnetic interference
B Increased energy storage
C Induced EMF
D Decreased resistance

Which material is commonly used for increasing the inductance of a coil?

A Copper
B Iron
C Aluminum
D Plastic

What is the effect of increasing the cross–sectional area of a coil on its inductance?

A Decreases inductance
B No effect
C Increases resistance
D Increases inductance

How does the length of the coil affect the inductance?

A Increases inductance
B No effect
C Decreases inductance
D Changes capacitance

What is the unit of inductance?

A Henry
B Ohm
C Farad
D Tesla

What does the self–inductance of a coil depend on?

A Only the material
B The current flowing through the coil
C The number of turns and coil geometry
D The voltage across the coil

What is mutual inductance in a magnetic circuit?

A Resistance between coils
B Induced current in a neighboring coil
C Self–inductance of a coil
D Power loss between coils

How does an increase in frequency affect the inductive reactance of a coil?

A Decreases reactance
B No effect
C Decreases current
D Increases reactance

What does flux linkage in an inductor depend on?

A Current and the number of turns
B Magnetic field strength
C Temperature
D Voltage across the coil