Electromagnets are made of soft iron because soft iron has:
low retentivity and high coercive force
high retentivity and high coercive force
low retentivity and low coercive force
high retentivity and low coercive force
Kindly explain the answer also.
what is the dimention formula of induced emf
Could you please derive the mutual induction and self induction for a conductor?
the equivalent inductance of two inductors is 2.4 H when connected in parallel and10 H when connected in series .The difference between two inductance is(neglecting mutual induction between coils)
why is spark produced in the switch of a fan ,when it is switched off?
Define fringe width, Derive an expression for fringe width in young’sdouble slitexperiment.
A simple pendulum with bob of mass m and conducting wire of length L swings(is hanging ) under gravity thro' an angle 2theetha.
The earth's magnetic feild component in the direction perpendicular to swing is B.
the max potential diff induced across pendulum is?
factors on which mutual inductance of two coils depends
The arm PQ of the rectangular conductor is moved from x=0, outwards. The uniform magnetic field is perpendicular to plane and exerts from x=0 to x=b and is 0 for x > b. Only the arm PQ possess substantial resistance r. Consider the situation when the arm PQ is pulled outward from x = 0 to x= 2b, and is then moved back to x=0 with constant speed v. Obtain expression for the flux, induced emf, the force necessary to pull the arm and the power dissipated as joule heat. Sketch the variation of these quantities with distance.
A metallic rod of length l is rotated at a constant angular speed omega, normal to a uniform magnetic field B. Derive an expression for the current induced in the rod, if the resistance of the rod is R.
Prove that E=1/2LI^2
a coil having L = 2 mH current flowing through it is I = t2 e-t then the time at which emf become 0
A solenoid have the self inductance 2H.If length of the solenoid is doubled having turn density and area constant then new self inductance is:-
(1)4 H
(2) 1 H
(3) 8 H
(4) 0.5 H
Electromagnets are made of soft iron because soft iron has:
low retentivity and high coercive force
high retentivity and high coercive force
low retentivity and low coercive force
high retentivity and low coercive force
Kindly explain the answer also.
what is the dimention formula of induced emf
Could you please derive the mutual induction and self induction for a conductor?
the equivalent inductance of two inductors is 2.4 H when connected in parallel and10 H when connected in series .The difference between two inductance is(neglecting mutual induction between coils)
why is spark produced in the switch of a fan ,when it is switched off?
Define fringe width, Derive an expression for fringe width in young’sdouble slitexperiment.
A simple pendulum with bob of mass m and conducting wire of length L swings(is hanging ) under gravity thro' an angle 2theetha.
The earth's magnetic feild component in the direction perpendicular to swing is B.
the max potential diff induced across pendulum is?
factors on which mutual inductance of two coils depends
The arm PQ of the rectangular conductor is moved from x=0, outwards. The uniform magnetic field is perpendicular to plane and exerts from x=0 to x=b and is 0 for x > b. Only the arm PQ possess substantial resistance r. Consider the situation when the arm PQ is pulled outward from x = 0 to x= 2b, and is then moved back to x=0 with constant speed v. Obtain expression for the flux, induced emf, the force necessary to pull the arm and the power dissipated as joule heat. Sketch the variation of these quantities with distance.
(1) BωR2 (2) (3) (4)
A metallic rod of length l is rotated at a constant angular speed omega, normal to a uniform magnetic field B. Derive an expression for the current induced in the rod, if the resistance of the rod is R.
Prove that E=1/2LI^2
a coil having L = 2 mH current flowing through it is I = t2 e-t then the time at which emf become 0