In the given arrangement magnetic field is B = 1T and radius of circular loop is 1m. Find emf induced in 1s.

A circular loop of radius 1m is placed in a varying magnetic field given as B=6t Tesla, where t is time in sec. (a)Find the emf induced in the coil if the plane of the coil is perpendicular to the magnetic field. (b) Find the electric field in the tangential directin, induced due to the changing magnetic field. (c)Find the current in the loop if its resistance is 1Omega//m .

A circular loop of radius a having n turns is kept in a horizontal plane. A uniform magnetic field B exists in a vertical direction as shown in Fig.313. Find the emf induced in the loop if the loop is roated with a uniform angualr velocity omega about (a) an axis passing through the center and perendicular to the plane of the loop. (b) the diameter.

Radius of a circular loop placed in a perpendicular uniform magnetic field is increasing at a constant rate of r_(o)ms^(-1) If at any instant radius of the loop is r, then emf induced in the loop at that instant will be

Radius ol a circular luop placed in a perpendicular uniform magnetic field is increasing at a constant rate of r_(o)ms^(1) . If at any instant radius of the loop is r, then emf induced in the loop at that instant will be

A long solenoid having n = 200 turns per metre has a circular cross-section of radius a_(1) = 1 cm . A circular conducting loop of radius a_(2) = 4 cm and resistance R = 5 (Omega) encircles the solenoid such that the centre of circular loop coincides with the midpoint of the axial line of the solenoid and they have the same axis as shown in Fig. A current 't' in the solenoid results in magnetic field along its axis with magnitude B = (mu)ni at points well inside the solenoid on its axis. We can neglect the insignificant field outside the solenoid. This results in a magnetic flux (phi)_(B) through the circular loop. If the current in the winding of solenoid is changed, it will also change the magnetic field B = (mu)_(0)ni and hence also the magnetic flux through the circular loop. Obvisouly, it will result in an induced emf or induced electric field in the circular loop and an induced current will appear in the loop. Let current in the winding of solenoid be reduced at a rate of 75 A //sec . Magnetic of induced electric field strength in the circular loop is nearly We know that there is magnetic flux through the circular loop because of the magnetic field of current in the solenoid. For the purpose of circular loop, let us call it the external magnetic field. As current in the solenoid is reducing, external magnetic field for the circular loop also reduced resulting in induced current in the loop. Finally, as the solenoid current becomes zero, external field for the loop also becomes zero and stop changing. However, induced current in the loop will not stop at the instant at which the external field stops changing. This is because induced current itself produces a magnetic field that results in a flux through the loop. External field becoming zero without any further change will compel the induced current in the loop to become zero and so magnetic flux through the loop due to change in induced current will also change resulting in a further induced phenomenon that sustains currents in the loop even after the external field becomes zero.

A uniform magnetic field vecB=0.25hatkT exists in a circular region of radius R=5m . A loop of radius R=5m lying in x-y plane encloses the magnetic field at t=0 and then pulled at uniform velocity vecv=4hatim//s . Find the emf induced (in volts) is the loop at t=2 sec

A circular loop of radius a, carrying a current I, is placed in a tow dimensional magnetic field. The centre of the loop coincides with the centre of the filed The strenght of the magnetic field at the pariphery of the loop is B. find the magnetic force on the wire.

A conducting cirular loop is placed in a unifrom transcerse magnetic field of 0.02 T . Somehow , the radius of the loop begins to decrease at a constant rate of 1. 0 mm/s . Find the emf induced in the loop at the instant when the radius is 2 cm.

A wire of length l in the form of a square loop lies in a plane normal to a magnetic field B_(0) . If this wire is converted into a circular loop in time, then find the average induced emf.