A toroidal coil has a mean radius of 16 cm and a cross-sectional area of 0.25 cm2 ; it is wound uniformly with 1000 turns. A second toroidal coil of 750 turns is wound uniformly over the first coil. Ignoring the variation of the magnetic field within a toroid, determine the mutual inductance of the two coils.

Q: A circular coil enclosing an area of 140 cm2 is made of 210 turns of copper wire. The wire making up…

A: Given Information:- Area of the circular coil is  A=140 cm2 =140 cm2×1 m100 cm2 =1.40×10-2 m2…

Q: A rectangular metallic loop of dimensions ℓ and ω and resistance R moves with constant speed υ to…

A: Given: Dimension of loop = l×w. Width of magnetic field = 3w. Velocity of loop = v. Resistance with…

Q: Two coils are placed near each other and they have a mutual inductance of 879.1 mH. If the current…

A: mutual inductance(M)=879.1 mH=879.1×10-3H  current i(t)=0.5e-1,625.3t to find: induced emf at…

Q: A long, straight solenoid has 800 turns. When the current in the solenoid is 2.90 A, the average…

A: We know, ε=-Ldidt=Ldidtdidt=εL=εNϕBI

Q: Suppose that a rectangular toroid has 2,000 windings and a self-inductance of 0.060 H. If the height…

A: The energy stored in an inductor is, U=12LI2

Q: Suppose that a rectangular toroid has 2000 windings and a self-inductance of 0.040 H. If h = 0.10 m…

A: Using the energy stored in an inductor, U=12LI2I=2UL

Q: A flexible loop has a radius of 12.0 cm and is in a magnetic field of magnitude 0.150 T. The loop is…

A: Given data The radius of the flexible loop is: R = 12 cm = 0.12 m The magnitude of the magnetic…

Q: A long, straight solenoid with a radius of rs = 3.0 cm and a length of y = 25 cm is wound with 1,500…

A:

Q: A rectangular loop with the given dimensions is being pulled out of a uniform magnetic field of…

A:

Q: The armature of an ac generator is a circular coil with 50 turns and radius 6.70 cm. When the…

A: Number of turns (n) = 50 Radius (r) = 6.70 cm = 0.067 m angular speed (ω) = 350 revm= 350×2π60 rads=…

Q: A solenoidal coil with 25 turns of wire is wound tightly around another coil with 310 turns. The…

A:

Q: A 490-turn solenoid, 30 cm long, has a diameter of 3.5 cm. A 15-turn coil is wound tightly around…

A: Initially, the current in the solenoid is zero. Therefore, the initial magnetic field will be zero.…

Q: A wire loop of radius 0.33 m lies so that an external magnetic field of magnitude 0.35 Tis…

A: Given  Radius of loop r=0.33m Initial magnetic field Bi=0.35T Final magnetic field Bf=0.16 T Time…

Q: A square coil of wire of side 2.50 cm is placed in a uniform magnetic field of magnitude 1.75 T…

A:

Q: A toroid of rectangular cross section has height h=0.0137 m, inner radius ry -0.0231 m and outer…

A:

Q: In a 280-turn automobile alternator, the magnetic flux in each turn is . = 2.50 x 10* cos wt, where…

A: The emf induced due to N closely spaced coils is given by Lenz's law:ε=-NdϕBdt………(1)where,ϕB is the…

Q: A square coil of wire of side 2.35 cm is placed in a uniform magnetic fleld of magnitude 1.50 T…

A:

Q: A square coil of wire of side 2.55 cm is placed in a uniform magnetic field of magnitude 1.75 T…

A:

Q: When the current in a toroidal solenoid is changing at a rate of 0.03A/s, the magnitude of the…

A: Given data Current changing at a rate of 0.03 A/s Magnitude of induced emf  11.9 mV Current 1.34 A…

Q: A 750-turn solenoid, 26 cm long, has a diameter of 2.5 cm. A 16-turn coil is wound tightly around…

A:

Q: The induced e.m.f. in a coil is 2.10 × 10-2 V when the current in it is changing at a rate of 7.00 x…

A:

Q: In a 290-turn automobile alternator, the magnetic flux in each turn is PR = 2.50 x 10-4 cos wt,…

A:

Q: A coil with a self-inductance of 6.0 H is connected to a dc battery through a switch. As šooh as the…

A:

Q: B 1 2 3 4 t

A:

Q: A square coil of wire of side 3.05 cm is placed in a uniform magnetic field of magnitude 1.75 T…

A:

Q: A square coil of wire of side 3.90 cm is placed in a uniform magnetic field of magnitude 2.25 T…

A:

Q: A long solenoid with a circular cross section has n turns per unit length and radius R. The current…

A:

Q: A flat circular coil having 120 turns. each one of cross-sectional area 0.028 m, is in a uniform and…

A: Number of turns, N = 120  Area, A = 0.028 m2  Magnetic field, B = 0.25 T  time, t = 5 ms

Q: A circular coil with 65 turns and radius 18.0 cm is placed around an electromagnet that produces a…

A:

Q: A small, closely wound coil has N turns, area A, and resistance R. The coil is initially in a…

A: Given:- Number of turn in the coil =N               area of the coil =A, and resistance of the coil…

Q: A square coil of wire of side 3.75 cm is placed in a uniform magnetic field of magnitude 1.75 T…

A:

Q: A 40-turn coil has a diameter of 13 cm. The coil is placed in a spatially uniform magnetic field of…

A:

Q: The graph gives the magnitude B(t) of a uniform B magnetic field that exists throughout a conduct-…

A:

Q: A circular coil has a 10.0 cm radius and consists of 30 closely wound turns of wire. An externally…

A: An inductor is a device that formed a known magnetic field in a stated region. If a current I is…

Q: An air-filled toroidal solenoid has a mean radius of 15.0 cm and a cross-sectional area of 5.00 cm2.…

A:

Q: When the current in a toroidal solenoid is changing at a rate of 0.234 A/s, the magnitude of the…

A: Given: current in the toroidal solenoid is changing at a rate of 0.234 A/s induced emf is 9 mV…

Q: A square coil of wire of side 3.40 cm is placed in a uniform magnetic field of magnitude 2.00 T…

A:

Q: A circular coil has 250 turns and radius 1.50 cm. When a current of 5.00 A flows in the coil, the…

A: Given, Number of turns n=250 Radius R=1.50 cm Current I=5.00 A Magnetic flux density B=0.050 T

Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.