Physics-

#### Permanent magnet has properties retentivity and coercivity respectively

Physics-General

- High-high
- Low-low
- Low-high
- High-low

#### Answer:The correct answer is: High-highThe materials for a permanent magnet should have high retentivity (so that the magnet is strong) and high coercivity (so that the magnetism is not wiped out by stray magnetic fields). As the material in this case is never put to cyclic changes of magnetization, hence hysteresis is immaterial.

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### Related Questions to study

physics-

#### The magnetic susceptibility of a paramagnetic substance at C is 0.0060, then its value atC will be

Therefore,

Or

Or

#### The magnetic susceptibility of a paramagnetic substance at C is 0.0060, then its value atC will be

physics-General

Therefore,

Or

Or

physics-

#### If a magnetic substance is kept in a magnetic field then which of the following substance is thrown out?

Magnetic substance when kept in a magnetic field is feebly repelled or thrown out if the substance is diamagnetic.

#### If a magnetic substance is kept in a magnetic field then which of the following substance is thrown out?

physics-General

Magnetic substance when kept in a magnetic field is feebly repelled or thrown out if the substance is diamagnetic.

physics-

#### Curie temperature is the one above which

The curie temperature or curie point of a ferromagnetic material is the temperature above which it looses its characteristic ferromagnetic ability to possess a net magnetization in the absence of an external magnetic field. Hence, above curie temperature material is purely paramagnetic.

#### Curie temperature is the one above which

physics-General

The curie temperature or curie point of a ferromagnetic material is the temperature above which it looses its characteristic ferromagnetic ability to possess a net magnetization in the absence of an external magnetic field. Hence, above curie temperature material is purely paramagnetic.

physics-

#### Which of the following is represented by the area enclosed by a hysteresis loop (B-H curve)?

Area enclosed by curve represents energy lost. If the area of hysteresis loop is less energy loss is low whereas if the area of hysteresis loop is large energy loss is high.

#### Which of the following is represented by the area enclosed by a hysteresis loop (B-H curve)?

physics-General

Area enclosed by curve represents energy lost. If the area of hysteresis loop is less energy loss is low whereas if the area of hysteresis loop is large energy loss is high.

physics-

#### For a paramagnetic material, the dependence of the magnetic susceptibility X on the absolute temperature is given as

For paramagnetic materials, the magnetic susceptibility gives information on the molecular dipole moment and hence on the electronic structure of the molecules in the material. The paramagnetic contribution to the molar magnetic susceptibility of a material, is related to the molecular magnetic moment Mby the Curie relation

#### For a paramagnetic material, the dependence of the magnetic susceptibility X on the absolute temperature is given as

physics-General

For paramagnetic materials, the magnetic susceptibility gives information on the molecular dipole moment and hence on the electronic structure of the molecules in the material. The paramagnetic contribution to the molar magnetic susceptibility of a material, is related to the molecular magnetic moment Mby the Curie relation

physics-

#### Susceptibility of ferromagnetic substance is

#### Susceptibility of ferromagnetic substance is

physics-General

physics

#### Shape of the graph of position time given in the figure for a body shows that

#### Shape of the graph of position time given in the figure for a body shows that

physicsGeneral

physics

#### As shown in the figure particle P moves from A to B and particle Q moves from C to D. Displacements for P and Q are and y respectively then

#### As shown in the figure particle P moves from A to B and particle Q moves from C to D. Displacements for P and Q are and y respectively then

physicsGeneral

physics

#### Here is a cube made from twelve wire each of length L, An ant goes from A to G through path A-B-C-G. Calculate the displacement.

#### Here is a cube made from twelve wire each of length L, An ant goes from A to G through path A-B-C-G. Calculate the displacement.

physicsGeneral

physics

#### As shown in the figure a particle starts its motion from 0 to A. And then it moves from. A to B. Is an are find the Path length

#### As shown in the figure a particle starts its motion from 0 to A. And then it moves from. A to B. Is an are find the Path length

physicsGeneral

maths-

#### Assertion (A): is divisible by the square of14 where n is a natural number Reason (R):

#### Assertion (A): is divisible by the square of14 where n is a natural number Reason (R):

maths-General

maths-

#### Assertion (A): Number of the dissimilar terms

in the sum of expansion is 206

Reason (R): Number of terms in the expansion of is n+1

Number of terms 52

#### Assertion (A): Number of the dissimilar terms

in the sum of expansion is 206

Reason (R): Number of terms in the expansion of is n+1

maths-General

Number of terms 52

maths-

#### B=600!, then

#### B=600!, then

maths-General

maths-

#### The arrangement of the following with respect to coefficient of in ascending order where A) in where B) where C) in where D) in

#### The arrangement of the following with respect to coefficient of in ascending order where A) in where B) where C) in where D) in

maths-General

maths-

#### A: If the term independent of in the expansion of is 405, then n=

: If the third term in the expansion of is 1000, then n=(here n<10)

: If in the binomial expansion of the coefficients of 5^{th} 6^{th} and 7^{th} terms are in A.P then n= [Arranging the values of n in ascending order]

#### A: If the term independent of in the expansion of is 405, then n=

: If the third term in the expansion of is 1000, then n=(here n<10)

: If in the binomial expansion of the coefficients of 5^{th} 6^{th} and 7^{th} terms are in A.P then n= [Arranging the values of n in ascending order]

maths-General