electrical 2 impotant questions

The opposition of magnetic flux _______.

• permeability
• Reluctance
• Magnetic Intensity
• permittivity

The unit of magnetic flux is_______.

• Henry
• Ampere & meter
• weber
• Ampere turn /weber

Induced EMF’S are classified_______.

• Maxwell’s law
• Lenz’s law
• Gauss’s law
• Newton’s law

A setup are transformer increase _______.

• D.C. potential difference
• D.C. resistance
• A.C. potential difference
• A.C. reactance

In an ideal transformer________.

• No voltage drops in resistance or leakage reactance
• MMF required to maintain main flux is small
• NO core loss
• All the above

The unit of reluctance is ________.

• Ampere/CM square
• Weber/M square
• Ampere turns/weber
• Ampere /weber

The reluctance is denoted by the letter___

• H
• B
• Φ
• S

self _inductance is denoted by the letter.

• K
• C
• L
• R

The force that produced magnetic field is_______.

• Force
• Electrical dipole
• Diamagnetic substance
• Time varying electrical field

The unit of EMF’s is________.

• Dyne
• Volt
• Joule
• Ampere