Mutually inductance between two magnetically-coupled coils depends on
all of the above
cross-sectional area of their common core
the number of their turns
permeability of the core
all of the above
A laminated iron core has reduced eddy-current losses because
the laminations are insulated from each other
the magnetic flux is concentrated in the air gap of the core
more wire can be used with less D.C. resistance in coil
the laminations are stacked vertically
the laminations are insulated from each other
The law that the induced e.m.f. and current always oppose the cause producing them is due to
Coulomb
Lenz
Faraday
Newton
Lenz
Which of the following is not a unit of inductance ?
Coulomb/volt ampere
Henry
Volt second per ampere
All of the above
Coulomb/volt ampere
In case of an inductance current is proportional to
neither nor
both and
voltage across the inductance
magnetic field
magnetic field
Which of the following circuit elements will oppose the change in circuit current ?
Capacitance
Resistance
Inductance
All of the above
Inductance
The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as
self-inductance
capacitance
series aiding inductance
mutual inductance
self-inductance
As per Faraday’s laws of electromagnetic induction an e.m.f. is induced in a conductor whenever it
cuts magnetic flux
lies in a magnetic field
lies perpendicular to the magnetic flux
moves parallel to the direction of the magnetic field
cuts magnetic flux
Which of the following circuit element stores energy in the electromagnetic field ?
Resistance
Inductance
Condenser
Variable resistor
Inductance
The inductance of a coil will increase under all the following conditions except
when more length for the same number of turns is provided
when the number of turns of the coil increase
when more area for each turn is provided
when permeability of the core increases
when more length for the same number of turns is provided
पोस्ट अच्छी लगी हो तो प्लीज नीचे दिए गए लिंक पर क्लिक कर शेयर जरुर करें
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