A 2-turn planer loop of flexible wire is placed inside a long solenoid of n turns per meter that carries a constant current I0 . The area A of the loop is changed by pulling on its sides while ensuring that the plane of the loop always remains perpendicular to the axis of the solenoid. If n = 500 turns per meter, I0 = 20 A, and A = 20 cm2, what is the emf induced in the loop when dA/dt = 100?

Q: A solenoid with 1200 turns per meter has a diameter of 5.00 cm. A current I = 2.47 A flows in the…

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Q: A long solenoid with 15 turns per cm has a small loop of area 2.0 cm2 placed inside the solenoid…

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Q: A coil of area A = 0.25 m2 is rotating with angular speed ω = 380 rad/s with the axis of rotation…

A: Part (a) Maximum emf induced in the loop is ε0=NABω

Q: A rectangular wire loop with length a and width b lies in the xy-plane, as shown below. Within the…

A: Given: A rectangular wire loop with length a and width b lies in the xy-plane, as shown below,

Q: A solenoid with 1200 turns per meter has a diameter of 2.00 cm. A current I = 2.40 A flows in the…

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Q: A square loop of side a lies on the a - y plane as shown in the figure. There exists a magnetic…

A: Answer  option(g) a3t

Q: A very long, straight solenoid with a cross-sectional area of 2.00 cm2 is wound with 90.0 turns of…

A: Given data: Cross-section area is, A=2.00 cm2=2.00×10-4 m2. Number of turns per centimeter is, n=90…

Q: A long solenoid has n = 400 turns per meter and carries a current given by I = 30.0(1 −e−1.60t),…

A: No. of turns per unit length, n = 400 turns/meter Current, I = 30(1-e-1.60t ) Radius , r = 6 cm =…

Q: A solenoid with 1200 turns per meter has a diameter of 2.00 cm. A current I = 2.47 A flows in the…

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Q: A rectangular loop of area A=0.160 m2 is placed in a region where the magnetic field is…

A: solution is given by

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 rectangular loop of area A=0.160 m2 is placed in a region where the magnetic field is…

A: Given: Area, A=0.160 m2 Time, t=4.5 s Magnetic field, B=0.448e-t/2 Formula: Induced emf: ε=-dϕdt…

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 small loop of area 6.8 mm2 is placed inside a long solenoid that has 854 turns/cm and carries a…

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Q: An eight-turn coil is tightly wrapped around the outside of the long solenoid as shown below. The…

A: The Faraday’s laws for solenoid says, Here, N is the number of turns in coil; ϕ is the magnetic…

Q: A circular wire loop with radius r = 20cm is placed in a region where magnetic field is…

A: The induced emf in the circular loop is given by the relation e = -dϕdt…

Q: Consider a wire loop of area A = 1m? initially far from any sources of magnetic field. A strong bar…

A: Given, Area(A)=1m² Magnetic field (B)=1T Time(T)=0.1s Induced emf(E)=?

Q: The figure below shows a circular conducting loop in the presence of an outward non-uniform magnetic…

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Q: A small loop of area A = 7.6 mm2 is inside a long solenoid that has n = 927 turns/cm and carries a…

A: Answer:-  Given  Area (A) = 7.6 mm2 = 7.6 × 10-6 m2  Number of turns per unit length (n) = N/L = 927…

Q: A wire loop of radius 12 cm and resistance 8.5 Q is located in a uniform magnetic field B that…

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Q: The figure below shows a circular conducting loop in the presence of an outward non-uniform magnetic…

A: Given: The magnetic field is 0.0006t3. The radius of the coil is 4.8 m. The resistance of the coil…

Q: A long, straight solenoid with a cross-sectional area of 8.00 cm2 is wound with 90 turns of wire per…

A: Expression for magnetic field -  B=μoni .....(1) Where,  μo=4π×10-7 N.A-2 Given values-  n=90 per cm…

Q: A long straight wire runs along the y-axis and carries a current i = 4.00cos (377t), where į is in…

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Q: A 750-turn solenoid, 23 cm long, has a diameter of 2.7 cm . A 11-turn coil is wound tightly around…

A: Consider the number of turns of the solenoid be N, the radius of the solenoid be r, the length of…

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

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Q: In Figure (a), a circular loop of wire is concentric with a solenoid and lies in a plane…

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Q: Two concentric circular coils of wire lie in a plane. The larger coil has 42 turns and a radius of a…

A: Write the given values of this problem. N1=42 turnsa=9.20 cmN2=4 turnsb=0.25 cmt=2 s

Q: A coil with an inductance of 2.0 H and a resistance of 10ohm is suddenly connected to an ideal…

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Q: A rectangular loop of area A=0.160 m2 is placed in a region where the magnetic field is…

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Q: For the wire arrangement in the figure, a = 17.0 cm and b = 21.3 cm. The current in the long…

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Q: A very long, straight solenoid with a cross sectional area of 1.92 cm2 is wound with 92.1 turns of…

A: A.The field inside the long solenoid is

Q: What If? Suppose a constant current of I = 6.00 A flows in the straight wire and the loop moves from…

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Q: The flexible loop in Figure has a radius of 34.5 cm and is in a magnetic field of magnitude 0.150 T.…

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Q: A circular loop of flexible iron wire has an initial circumference of 130 cm at t=0, but its…

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Q: solenoid with 1200 turns per meter has a diameter of 7.00 cm. A current I = 2.35 A flows in the…

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Q: The flexible loop in Figure has a radius of 20.7 cm and is in a magnetic field of magnitude 0.150 T.…

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Q: A rectangular loop of area A=0.160 m is placed in a region where the magnetic field is perpendicular…

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Q: A long solenoid of radius r = 1.60 cm is wound with 4.00 ✕ 103 turns/m and carries a current that…

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Q: A solenoid of length 3.70 cm and diameter 0.760 cm is wound with 272 turns per centimeter. A) If…

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Q: A solenoid ring with N = 3 loops is immersed in a uniform time-varying magnetic field (shown in the…

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Q: Consider a coil with an area of 0.1 m2 and 17 turns placed in a magnetic field that is perpendicular…

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Q: A coil with radius 4.00 cm contains 500 turns, and is placed in a uniform magnetic field that varies…

A: According to the faraday's law of electro magnetic induction  The rate of change of magnetic flux is…

Q: In the figure, the magnetic flux through the loop increases according to the relation OB = 5.8t2 +…

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Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.