Magnetism and Electromagnetism

Ferrites are materials A. paramagnetic B. diamagneticC. ferromagnetic D. none of the above

The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________? A. proportional to 7B. proportional to X C. proportional to distance between the conductors D.…

Air gap has_________eluctance as compared to iron or steel path? A. littleB. lower C. higher D. zero

Which of the following is a vector quantity ? A. Relative permeabilityB. Magnetic field intensity C. Flux density D. Magnetic potential

A material which is slightly repelled by a magnetic field is known as_____________? A. ferromagnetic materialB. diamagnetic material C. paramagnetic material D. conducting material

Fleming’s left hand rule is used to find_________________? A. direction of magnetic field due to current carrying conductor B. direction of flux in a solenoidC. direction of force on a current carrying conductor in a magnetic field…

Magnetising steel is normals difficult because____________? A. it corrodes easily B. it has high permeability C. it has high specific gravityD. it has low permeability

When an iron piece is placed in a magnetic field_____________? A. the magnetic lines of force will bend away from their usual paths in order to go away from the pieceB. the magnetic lines of force will bend away from their usual…

The ratio of intensity of magnetisation to the magnetisation force is known as_____________? A. flux densityB. susceptibility C. relative permeability D. none of the above

Materials subjected to rapid reversal of magnetism should have______________? A. large area oiB-H loopB. high permeability and low hysteresis loss C. high co-ercivity and high retentivity D. high co-ercivity and low density…