Which of the following flows only in one direction?
DC
AC
Both 1 and 2
None of these
Weber / meter2 is the unit of
Magnetic field
Magnetic flux
Magnetic intensity
Magnetic force
The magnetic field lines inside a current carrying solenoid are:
along the axis and parallel to each other.
perpendicular to the axis and equidistant from each other.
circular but they do not intersect each other.
circular at the ends inside the solenoid.
In a step up transformer?
Ns = Np
Ns < Np
Ns > Np
Nothing can be said
Which of the following has its working based on electromagnetic induction?
DC motor alone
AC generator alone
Transformer alone
Both AC generator and transformer
The direction of induced current is obtained by
Fleming's left hand rule
Clock rule
Right hand thumb rule
Fleming's right hand rule
In an electric motor, the energy transformation is:
from electrical - chemical
from chemical - light
mechanical - electrical
electrical - mechanical
Which of the following statement is incorrect? The speed of rotation can be increased by,
increasing the strength of current
increasing the number of turns of coil
increasing the area of coil
decreasing the strength of magnetic field
Direction of induced emf can be obtained from
Lenz's law
Flemings right hand rule
Flemings left hand rule
