1. The electric field is defined as the Coulomb force per unitchange. Explain wh
ID: 1675349 • Letter: 1
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1. The electric field is defined as the Coulomb force per unitchange. Explain why the magnetic field cannot be defined as themagnetic force per unit of charge. 2. An Ac generator consists of 8 turns of wire in a loopor coil, the cross-sectional area of the loop is A = 0.09m2, with a total resistance of 12 ohms. The loop isrotating in a magnetic field. B = 0.5 T at a constant rate of 60Hz. A) Find the maximum EMF and current induced in the coil; B) Write the equations for the time variation of the inducedEMF and current. 3. A permanent bar magnet has a field strength of 1 T .Suppose we have a circular wire loop of radius R = 0.50cm that carrying a current of I Amperes. What current is required tomake a magnetic field at the center of the wire loop that is equalto the field of the bar magnet? 2. An Ac generator consists of 8 turns of wire in a loopor coil, the cross-sectional area of the loop is A = 0.09m2, with a total resistance of 12 ohms. The loop isrotating in a magnetic field. B = 0.5 T at a constant rate of 60Hz. A) Find the maximum EMF and current induced in the coil; B) Write the equations for the time variation of the inducedEMF and current. 3. A permanent bar magnet has a field strength of 1 T .Suppose we have a circular wire loop of radius R = 0.50cm that carrying a current of I Amperes. What current is required tomake a magnetic field at the center of the wire loop that is equalto the field of the bar magnet?Explanation / Answer
1)Magnetic field is defined as force experianced by the unit northpole placed in the magnetic field that is magnetic force per unitpole. 2) A) Area of the loop is A=0.09m2 Resistance of teh loop isR =12ohms B =0.5T frequency f = 60 Hz Then emf induced is given as =( NBA)sint N =number of turns of the loop=8 =angular frequency =2f=2(60Hz) = 376.8 rad/s Then maximum induced emf ismax=NBA =8*(0.5T)*(0.09m2)*(376.8rad/s)=135.65V Then maximum induced currentImax= max/R =135.65 V / 12 =11.3 A B) Emf induced is given as =(NBA)sint Current induced is I =/R = ( NBA)sint / R 3) Magnetic field at the center of the loop is B=0NI/2R N =number of turns =1 R= radius of the loop =0.5 cm=0.5*10-2m B magnet=1T Given that B =Bmagnet 0NI/2R =1 T (4*10-7 T.m/A) (1)(I)/2(0.5*10-2m) = 1T I = 7.961*103A 0NI/2R =1 T (4*10-7 T.m/A) (1)(I)/2(0.5*10-2m) = 1T I = 7.961*103A
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