Q.1.
For a given wirewound core, an increase in current through the coil
Q.2.
The induced voltage across a coil withturns that is located in a magnetic field that is changing at a rate of 8 Wb/s is
Q.3.
When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage
Q.4.
The rate of rise of current through an inductive coil is maximum
Q.5.
Conductivity is analogous to
Q.6.
The property of a material which opposes the creation of magnetic flux in it is known as
Q.7.
Hysteresis loss least depends on
Q.8.
The unit of reluctance is
Q.9.
Hard steel is suitable for making permanent magnets because
Q.10.
Energy stored by a coil is doubled when its current is increased by percent.
Q.11.
The relative permeability of a ferromagnetic material is
Q.12.
The unit of retentivity is
Q.13.
If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be
Q.14.
When both the inductance and resistance of a coil are doubled the value of
Q.15.
Conductance is analogous to
Q.16.
A ferrite core has less eddy current loss than an iron core because
Q.17.
Permanent magnets are normally made of
Q.18.
Reciprocal of reluctance is
Q.19.
Permeability in a magnetic circuit corresponds to_________ in an electric circuit.
Q.20.
In a magnetic material hysteresis loss takes place primarily due to