Q2 The suscepbility of ferromagnetic substance depend on _,
Q3 In a vacuum, permeability is equals to
Q4 Magnetic susceptibility is __for paramagnetic material
Q5 , __magneticm are closely related to ferromagnetism.
Q6 At curies temperature ferromagnetic materials behave like a _material
Q7 Magnetic materials canbe classified into three groups. Name them __, __,
Q8 _is defined as the magnetic dipole moment per unit volume.
Q9 The product of flux and reluctance is termed
Q10 The reluctance varies with
Q11 If electric field exerts a torque on the orbiting electron, the resultant is equal to the rate of change of its
Q12
law states that the line integral of E around any closed path equals
the rate of change of the magnetic flux through the surface enclosed by
path
Q13 Paramagnetism involves change in the of the magnetic moment of an atom.
Q14 factor is a characteristics of the state of the atom
Q15 The property of electron in an atom behaving as if it were rotating around an axis of its own is called
Q16 The ratio of the magnetic moment and the angular momentum is called
Q17 Bimuth is an example of
Q18 There are two types of non-magnetic materials, name them __,
Q19 __polarisation occurs by the distortion of the electronic structure.
Q20 If we determine the relative permittivity at different pressures for a gas, we can calculate the
Q21 For a dielectric, the refraction index is defined as the ratio of the to
Q22 The relationship between polarisability and relative permittivity is that of _equation
Q23 The electric field inside the dielectric sphere is and in the direction of the polarisation vector.
Q24 The field at the centre of a spherical cavity filled with air is called
Q25 If molecule/atom is removed when all other charges remain inaffected, the field is called
Q26 The magnetic properties of a substance can be characteristics by magnetic
Q27 The electric field inside the dielectric is than the electric field causing polarisation
Q28 The function of the earthed conductor is simply to reduce the
potential of the first conductor and thereby to increase its
Q29 Another name for coulomb/volt is
Q30 The ratio of the charge placed on the conductor to the change in its potential is called
Q31 The resultant capacitance of two capacitors C1 and C2, when connected in parallel is given by
Q32 Any device which can store charge is a
Q33 An electrolytic capacitor must be placed in a AC circuit such that the potential of the oxide plate is always relative to the other plate.
Q34 the two types of electrolytic capacitors are ,
Q35 The electrolyte in a electrolytic capacitors is a solution of ,
Q36 The positive plate of electrolytic capacitors is coated with a thin layer of aluminium oxide which serves as
Q37 An electrolytic capacitor consists of two electrodes of
Q38 Capacitors may be broadly classified into two groups namely _,
Q39 For capacitors connected in series the reciprocals of the capacitances add up to give the reciprocal of the
Q40 The intermediate plates in two capacitor acquire equal and opposite charges because of
Q41 The effective capacitance of the parallel combination of capacitor is equal to the sum of the individual
Q42 If three capacitors are connected in series and a voltage source is connected across the two end plates __charged will be induced in each capacitor.
Q43 The capacitance per unit length of a cylindrical capacitor depends on __,
Q44 A cylindrical capacitor is made up of
Q45 mention two forms of capacitor that you have studied ,
Q46 The maximum safe voltage in a capacitor is called
Q47 The ratio of the capacitance with dielectric between the plates to
the capacitance with free space between the plates is equal to
Q48 The capacitance of a parallel plate capacitor increases with the increase in _of the plates and also with the decrease of the
Q49 The polarised dielectric slab reduces the _inside the dielectric by a factor.
Q50 The S.I. unit of capacitance C si
Q51 Another name for a capacitor is
Q52 The minimum potential that causes the charge separation is known as the and the process is known as the
Q53 The induced dipole moment is given as p=αE where α is
Q54 The charges appearing on the surface of the dielectric are called
Q55 Polarisation depends on field that is __,
Q56 The induced dipole moment (p) of the molecule increases with the increase in the average field €.TRUE or FALSE
Q57 An atom consists of a positively charged nucleus and negatively
charged particles with electrons revolving around it.TRUE or FALSE
Q58 Faraday in his experiment found that the capacitor is independent
of the shape and size of the material but varies from matrial to
material. TRUE or FALSE
Q59 The breakdown voltage is the applied potential difference per unit
length of the dielectric when the dielectric just breakdown. TRUE or
FALSE
Q60 Any device which can store charge is a called
Q61 In the absence of external magnetic field, each atom of a magnetic
substance has a vector sum of magnetic moment of all the electonic
orbits equal to zero is _______theory.
Q62 The potential of a conductor increases as the charged place on it is __________
Q63 Electric dipole moment per unit volume is known as ____________
Q64 The following parameters are magnetic moments of an atom except one
Q65 The magnetic flux is produced by the magnet due to some force called______
Q66 The magnetic properties of material are completely specified by the following quantities except one__
Q67 In paramagnetic and diamagnetic materials, the magnetisation is maintained by________
Q68 The behaviour of ferromagnetic materials under action of changing magnetic fields exhibits the phenomenon called_____
Q69 In the presence of a magnetic field, the atom
does not simply turn along the magnetic field but presses around it with
a frequency called
Q70 Paramagnetism is exhibited by those atoms which do not have magnetic ______
Q71 A change in orbital speed means a change in the _______
Q72 The magnetic moments are induced in a direction ________to that of the external magnetic field.
Q73 The unit of magnetic dipole moment is _____
Q74 The following characteristics of dielectric are desirable for use in capacitors except one
Q75 The refractive index of the same substances can be determined by_________
Q76 In estimating the capacitance of the guard ring capacitor, one of the following is considered_______
Q77 A common capacitor whose capacitance can be varied continuosly is used for_________
Q78 One of the advantages with the ceramic dielectrics is that they have _________
Q79 All of the following are the uses of a capacitor except one _______
Q80 An example fo non-polar molecules is________
Q81 _____________is an examples of electric insulators.
Q82 Reluctance depends on the following except_____
Q83 The ratio of the intensity of magnetisation induced in it and magnetic field is called______
Q84 The total number of lines of force per unit area
due to magnetising field and due to the field induced in the substance
is called _______
Q85 What is the value of magnetic susceptibility in a vacuum
Q86 The temperature at which the forces of thermal agitation dominate exchange forces is called_____
Q87 The magnetic dipole moment of the atoms arises due to the spins of _______electrons
Q88 When a diamagnetic atom is placed in an external
magnetic field normal to its orbit, the field induces a magnetic moment
opposing the field itself. This statement is ______
Q89 The orbital motion of the electron is associated with a magnetic moment n, which is proportional to its orbital______
Q90 The magnetic field produced by the magnetised material is obtained by______
Q91 The magnetic resistance is known as _______
Q92 Diamagnetism involves a change in the ______of the magnetic moment of an atom.
Q93 Gyro-magnetic ratio is independent of the _____and_____
Q94 An aluminium is a typical example of _____material
Q95 Materials which are not influenced by a magnet are called _____
Q96 For polar substances, relative permittivity varies with _______
Q97 The relation between polarisability and refractive index is known as the_______
Q98 Which of the field causes polarisation of the atom.
Q99 In an electric field, the electrons and atomic nuclei of the dielectric material experience ______in opposite direction
Q100 Capacitors are used in ________field
Q101 Ceramic capacitors are useful in ______circuits.
Q102 When a dielectric slab is inserted between the parallel plates of a condenser the capacity is _______
Q103 The field strength at which the dielectric is about to break down is known as the ____________
Q104 Non-polar molecule acquires a Dipole moment only in the presence of__________
Q105 In a dielectric material, the centres of
positive and negative charges of its atoms are found to_________at the
centre of the sphere.
Q106 In dielectrics, all the electrons are________to their respective atoms.
Q107 When a potential difference is applied to the insulators___________
Q108 The reciprocal of reluctance is called______
Q109 Change in the orientation of the magnetic moment accounts for _______
Q110 The magnetic moment due to current is the product of the ______and the ______of which the electron path is the boundary
Q111 ________equation gives the relation between susceptibility and atomic/molecular polarisability.
Q112 Electrolytic aluminium oxide is used where
Q113 The unit of permeance is ________
Q114 The unit of reluctance is ________
Q115 The product of current in amperes and number of turn is called________
Q116 The ratio of the magnetic induction B in the medium to the magnetising field is called _______
Q117 Magnetic susceptibility is negative for ____substance.
Q118 The magnetic properties of a substance can be characteristics by magnetic ________
Q119 A large number of varieties of plastics are good examples of ____________
Q120 Faraday experiemntally found that when an
insulating material called dielectric is introduced between two plates
of a capacitor, it is found that the capacitance is increased by a
factor which is greater than ______________