EASY
Earn 100
A diamagnetic material in a magnetic field moves
50% studentsanswered this correctly
Important Questions on Matter and Magnetism
EASY
The magnetic susceptibility is negative for:
EASY
A paramagnetic material has . Its magnetic susceptibility at temperature is . Its susceptibility at is
EASY
Magnetic materials used for making permanent magnets and magnets in a transformer have different properties of the following, which property best matches for the type of magnet required?
MEDIUM
Above the curie temperature the susceptibility of a ferromagnetic substance varies
HARD
Nickel combines with a uninegative monodentate ligand to form a diamagnetic complex The hybridisation involved and the number of unpaired electrons present in the complex are respectively:
EASY
The meniscus of a liquid contained in one of the limbs of a narrow U -tube is placed between the poles of an electromagnet with the meniscus in a line with the field. The liquid is seen to rise to the line. This indicate that the liquid is ___ .
EASY
Which one of the following characteristics is not associated with a paramagnetic material?
EASY
In a ferroelectric material, as the applied field is gradually reduced to zero, the polarization still left is known as
MEDIUM
Hysteresis loops for two magnetic materials and are given below:
These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use:
MEDIUM
The figure gives experimentally measured vs. variation in a ferromagnetic material. The retentivity, coercivity and saturation, respectively, of the material are:
EASY
The magnetic susceptibility of a paramagnetic substance at is . To have the susceptibility , the change in temperature in is
MEDIUM
Consider the regular array of vertical identical current-carrying wires (with the direction of current flow as indicated in the figure below) protruding through a horizontal table. If we scatter some diamagnetic particles on the table, they are likely to accumulate-
EASY
Substances, when placed in a magnetic field acquire feeble magnetisation in the direction opposite to that of the applied field are called
EASY
A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is placed in a uniform magnetic field . Then the field inside the paramagnetic substance is:
EASY
Needles and are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet, when brought close to them, will
EASY
The correct definition of Meissner effect is
EASY
In a superconductor, critical magnetic field
EASY
Coercivity of a magnet where the ferromagnet gets completely demagnetized is . The minimum current required to be passed in a solenoid having turns per metre, so that the magnet gets completely demagnetized when placed inside the solenoid is
EASY
An example of a perfect diamagnet is a superconductor. This implies that when a superconductor is put in a magnetic field of intensity , the magnetic field inside the superconductor will be such that
MEDIUM
The coercivity of a small magnet, where the ferromagnet gets demagnetised is . The current required to be passed in a solenoid of length and number of turns , so that the magnet gets demagnetised when inside the solenoid is
