A square coil of wire of side 2.80 cm is placed in a uniform magnetic field of magnitude 1.25 T directed into the page as in Figure P20.31. The coil has 28.0 turns and a resistance of 0.780 Ω. If the coil is rotated through an angle of 90.0° about the horizontal axis shown in 0.335 s, find (a) the magnitude of the average emf induced in the coil during this rotation and (b) the average current induced in the coil during this rotation.

Q: The flexible loop in Figure has a radius of 23 cm and is in a magnetic field of magnitude 0.150 T.…

A: Please see the answer in Step 2

Q: A 40-loop square coil has a side length of 10.0 cm. It is placed in a magnetic field so that the…

A: Given: Number of coil, N=40 Length of side of square, a=10.0 cm Initial magnetic field, Bi=0.20 T…

Q: The figure below shows a 108-turn square coil rotating about a vertical axis at at = 1,570 rev/min.…

A:

Q: A conductor is formed into a flat loop that encloses an area of 1.0 m2 The plane of the loop is…

A: Given data: Area enclosed by conducting loop, A= 1.0 m2  Maximum induced emf, ε= 25.0 V The  loop…

Q: A metal rod with a length of 27.0 cm lies in the ry-plane and makes an angle of 33.6° with the…

A: Given:length of the rod, L = 27.0 cm = 0.27 mangle between rod and x axis, θ = 33.6ovelocity of rod,…

Q: A 50-turn rectangular coil with dimensions 0.15 m x 0.40 m rotates in a uniform magnetic field of…

A: Given data N=50A=0.15 m×0.4 mB=0.75 TN=3600 rev/min

Q: A loop of wire sits in an external magnetic field as shown (in other words, the field shown in the…

A: Let B1 and B2 denote the initial and the final magnetic field, ϕ1 and ϕ2 denote the initial and the…

Q: A circular copper ring, A = 0.1 m2 shown below, with 10 loops is positioned in a (Bi) 0.300 T…

A: Magnetic flux is defined in a similar way as that to electric flux and is given by the dot product…

Q: A coil has an area of 100 cm2 with 226 turns connected across a 5.00 Q resistor to form a closed…

A:

Q: A circular loop of wire of radius 12.0 cm is placed in a magnetic field directed perpendicular to…

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Q: A coil consists of 80 turns of wire. Each turn is a square of side d = 40 cm, and a uniform magnetic…

A:

Q: 9. A bar of mass m and resistance R slides without friction in a horizontal plane, moving on…

A:

Q: A coil has an area of 100 cm2 with 198 turns connected across a 5.00 Q resistor to form a closed…

A: The expression for the induced emf is written as, Here, N, Δφ and Δt represent the number of turns…

Q: The flexible loop in Figure P20.10 has a radius of 12 cm and is in a magnetic field of strength 0.15…

A: Given:  radius, r = 12 cm = 0.12 m  magnetic field, B = 0.15 T  t = 0.2 s

Q: A 40-loop circular coil has a radius of 10.0 cm. It is placed in a magnetic field so that the field…

A: The induced emf in a coil in the presence of a magnetic field is given by the lenz law ε=-N∆φ∆t…

Q: 2. Circle coil area 3.0 square centimeter Placed in a uniform magnetic field (B) 0.5 tesla, directed…

A:

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

A:

Q: A 50 cm long metal rod moves along the two rails in a plane of the circuit shown and is placed…

A:

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

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Q: B= 0.4 T X X X X Xxx X x Xxx V= 0.8 m\s 600 a x XX X XXX X x X X XXx a copper rod is sliding on two…

A:

Q: A square coil of wire of side 2.35 cm is placed in a uniform magnetic field of magnitude 2.00 T…

A:

Q: A conducting rod of length 2 cm moves with velocity 3 m/s parallel to a long wire carrying a steady…

A: Let r denote the distance from the wire, a denote the distance of the near end of the moving…

Q: A circular loop of wire of resistance R = 0.500 V and radius r = 8.00 cm is in a uniform magnetic…

A:

Q: A bar of mass m and resistance R slides without friction in a horizontal plane, moving on parallel…

A: Given data: Mass of bar =m  Resistance in bar =R, Distance between the rails =d.

Q: When a coil is placed in a magnetic field, the coil's normal to the plane stays parallel to the…

A: Given information: A system of coil, magnetic field are arranged in such a manner that average emf…

Q: A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a…

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: t a particular place on the surface of the Earth, the Earth's magnetic field has magnitude of 4.50 ✕…

A: UE=0.5ε0E2=0.58.854×10-12 C/N·m2148 V/m2=9.70×10-8 J/m31 nJ10-9 J=97.0 nJ/m3

Q: The flexible loop in Figure has a radius of 25.5 cm and is in a magnetic field of magnitude 0.150 T.…

A: r

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…

A:

Q: 4. A cylindrical ingot moves to the left at a constant speed (v) equal to 40.0 centimeters per…

A: speed (v) = 40 cmsec= 0.4msLength (L) = 20 cm = 0.2 mResistance (R) = 2 ohm magnetic field (B) = 0.5…

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

A:

Q: An electric current flows through a coil with an inductance of 6.7 mH. The graph shows the…

A:

Q: A square coil of wire of side 3.20 cm is placed in a uniform magnetic field of magnitude 2.25 T…

A: The area of a square coil is, A=3.20 cm3.20 cm=0.032 m0.032 m=1.024×10-3 m2 The magnetic field is,…

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

A:

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

A:

Q: A coil has an area of 100 cm2 with 282 turns connected across a 5.00 Q resistor to form a closed…

A:

Q: The bolt of lightning depicted in Figure P20.61 passes 200. mfrom a 100-turn coil oriented as shown.…

A:

Q: A loop of wire sits in an external magnetic field as shown (in other words, the field shown in the…

A:

Q: A fixed 13.3-cmcm-diameter wire coil is perpendicular to a magnetic field 0.59 TT pointing up. In…

A:

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

A:

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: A long solenoid of radius r = 2.00 cm is wound with 3.50 × 103 turns/m and carries a current that…

A: Write the given values, and determine the cross-sectional area of the solenoid.

Q: In the figure, the magnetic flux through the loop increases according to the relation ΦB = 4.9t2 +…

A: Given,

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.