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 D. polarity of…
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…
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
The unit of relative permeability is_____________? A. henry/metre B. henry C. henry/sq. mD. it is dimensionless
Indicate which of the following material does not retain magnetism permanently A. Soft iron B. Stainless steel C. Hardened steel D. None of the above
The force between two long parallel conductors is inversely proportional to_____________? A. radius of conductors B. current in one conductor C. product of current in two conductorsD. distance between the conductors
The left hand rule correlates to______________? A. current, induced e.m.f. and direction of force on a conductor B. magnetic field, electric field and direction of force on a conductor C. self induction, mutual induction and direction of force on a…
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be______________? A. zero B. BLI C. B2LI D. BLI2