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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physics-
The magnetic susceptibility of a paramagnetic substance at 
C is 0.0060, then its value at
C will be
Therefore,
Or
The magnetic susceptibility of a paramagnetic substance at C is 0.0060, then its value atC will be
physics-General
Therefore,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.
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.
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
is related to the molecular magnetic moment Mby the Curie relationFor 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
is related to the molecular magnetic moment Mby the Curie relationphysics-
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 5th
6th and 7th 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 5th 6th and 7th terms are in A.P then n= [Arranging the values of n in ascending order]
maths-General