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Title
Tesla is a unit of

Tesla is a unit of

  1. field strength
  2. inductance
  3. flux density
  4. flux
discuss
A permeable substance is one

A permeable substance is one

  1. which is a good conductor
  2. which is a bad conductor
  3. which is a strong magnet
  4. through which the magnetic lines of force can pass very easily
discuss
The materials having low retentivity are suitable for making

The materials having low retentivity are suitable for making

  1. weak magnets
  2. temporary magnets
  3. permanent magnets
  4. none of the above
discuss
A magnetic field exists around

A magnetic field exists around

  1. iron
  2. copper
  3. aluminium
  4. moving charges
discuss
Ferrites are materials

 Ferrites are materials.

  1. paramagnetic
  2. diamagnetic
  3. ferromagnetic
  4. none of the above
discuss
Air gap has_______eluctance as compared to iron or steel path

Air gap has_______eluctance as compared to iron or steel path

  1. little
  2. lower
  3. higher
  4. zero
discuss
The direction of magnetic lines of force is

The direction of magnetic lines of force is

  1. from south pole to north pole
  2. from north pole to south pole
  3. from one end of the magnet to another
  4. none of the above
discuss
Which of the following is a vector quantity ?

Which of the following is a vector quantity ?

  1. Relative permeability
  2. Magnetic field intensity
  3. Flux density
  4. Magnetic potential
discuss
The two conductors of a transmission line carry equal current I in opposite directions.The force on each conductor is

The two conductors of a transmission line carry equal current I in opposite directions.The force on each conductor isa

  1. proportional to 7
  2. proportional to X
  3. proportional to distance between the conductors
  4. inversely proportional to I
discuss
A material which is slightly repelled by a magnetic field is known as

A material which is slightly repelled by a magnetic field is known as

  1. ferromagnetic material
  2. diamagnetic material
  3. paramag>etic material
  4. conducting material
discuss
When an iron piece is placed in a magnetic field

 When an iron piece is placed in a magnetic field

  1. ferromagnetic material
  2. diamagnetic material
  3. paramag>etic material
  4. conducting material
discuss
When an iron piece is placed in a magnetic field

When an iron piece is placed in a magnetic field

  1. the magnetic lines of force will bend away from their usual paths in order to go away from the piece
  2. the magnetic lines of force will bend away from their usual paths in order to pass through the piece
  3. the magnetic field will not be affected
  4. the iron piece will break
discuss
Fleming's left hand rule is used to find

 Fleming's left hand rule is used to find

  1. direction of magnetic field due to current carrying conductor
  2. direction of flux in a solenoid
  3. direction of force on a current car¬rying conductor in a magnetic field
  4. olarity of a magnetic pole
discuss
The ratio of intensity of magnetisation to the magnetisation force is known as

The ratio of intensity of magnetisation to the magnetisation force is known as

  1. flux density
  2. susceptibility
  3. relative permeability
  4. none of the above
discuss
Magnetising steel is normals difficult because

Magnetising steel is normals difficult because

  1. it corrodes easily
  2. it has high permeability
  3. it has high specific gravity
  4. it has low permeability
discuss
The left hand rule correlates to

The left hand rule correlates to

  1. current, induced e.m.f. and direc¬tion of force on a conductor
  2. magnetic field, electric field and direction of force on a conductor
  3. self induction, mutual induction and direction of force on a conductor
  4. current, magnetic field and direc¬tion of force on a conductor
discuss
The unit of relative permeability is

The unit of relative permeability is

  1. henry/metre
  2. henry
  3. henry/sq. m
  4. it is dimensionless
discuss
A conductor of length L has current I passing through it, when it is placed parallel to amagnetic field. The force experienced by the conductor will be

A conductor of length L has current I passing through it, when it is placed parallel to amagnetic field. The force experienced by the conductor will be

  1. zero
  2. BLI
  3. B2LI
  4. BLI2
discuss
The force between two long parallel conductors is inversely proportional to

The force between two long parallel conductors is inversely proportional to

  1. radius of conductors
  2. current in one conductor
  3. product of current in two conduc¬tors
  4. distance between the conductors
discuss
Materials subjected to rapid reversal of magnetism should have

Materials subjected to rapid reversal of magnetism should have

  1. large area oiB-H loop
  2. high permeability and low hysteresis loss
  3. high co-ercivity and high reten-tivity
  4. high co-ercivity and low density
discuss
total MCQs: 86

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