The 1700-turn coil in a dc motor has an area per turn of 1.2 × 10-2 m2. The design for the motor specifies that the magnitude of the maximum torque is 3.4 N·m when the coil is placed in a 0.22-T magnetic field. What is the current in the coil?

Q: A generator has a square coil consisting of 640 turns. The coil rotates at 96 rad/s in a 0.350 T…

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Q: A square loop of wire is rotating clockwise at a speed of 7.0 revolutions per second in a uniform…

A: w= 7 rev/sec = 7 *2π rad/sec B=0.02 T side = 15 cm = 0.15 m  area (A) = 0.15 * 0.15 = 0.0225 m2 R =…

Q: The square loop as in the figure is made of wires with total resistance R =9.8 N. The loop is placed…

A: Given,

Q: How fast would a metalic airplane with a 25 m wingspan have to fly through the vertical 5.6 x 10-8 T…

A: As charges on wing span experiece magnetic force and travel to the ends of wing and electric field…

Q: A square, 40-turn coil 10.0 cm on a side with a resistance of 0.720 Ω is placed between the poles of…

A: "Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…

Q: A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 7.7 x103 rad/min as…

A: Given data:   Number of turns, N = 100 turns    Area, = 20 cm = 0.2 m   Magnetic field, B = 2*105 T…

Q: A square coil of wire of side 2.25 cm is placed in a uniform magnetic field of magnitude 2.00 T…

A: Here length of square = 2.25 cmUniform magnetic field = 2TTurns of the coil (N) = 27.5Resistance (R)…

Q: The loop in the figure is being pushed into the 0.60 T magnetic field at 70 m/s . The resistance of…

A: The induced emf in the loop is

Q: A generator has a circular coil consisting of 560 turns. The coil rotates at 75.4 rad/s in a 0.688 T…

A:

Q: A DC motor powered by a 15.0 V power supply has a 100-turn square coil with sides of length 10.0 cm…

A:

Q: A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 4.8 x103 rad/min as…

A: Number of turns = N = 100 Side of the square coil = 20 cm = 0.2 m Area of the coil = A = 0.04 m2…

Q: A motor powered by a 9.0 V battery has a square coil with 30 turns with sides 5.0 cm long and a…

A: voltage of the battery (V) = 9 volts number of turns (N) = 30 turns side of square coil (s) = 5 cm =…

Q: A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 4.3 x103 rad/min as…

A: N = 100 l = 20 cm = 0.2 m A = l2 = (0.2)2 = 0.04 m2 B = 2 x 10-5 T ω = 4.3 x 103 rad/min =…

Q: Two generators use the same magnetic field and operate at the same frequency. Each has a single-turn…

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Q: A rectangular coil with sides 0.140 m by 0.210 m has 513 turns of wire. It is rotated about its long…

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Q: A very long, hollow cylindrical coil with a cross-sectional area of 70 cm2 and the number of turns…

A: Calculate the magnetic field produced by the cylindrical coil. B=μ0ni=4π×10-7 H/m×4500/m×5 A=0.0282…

Q: Near the surface of the planet, the Earth's magnetic field is about 0.50x 10-4 T. How much energy is…

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Q: A very long hollow cylindrical coil with a cross-sectional area of 70 cm2 and the number of turns…

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Q: A 19.0 cm-diameter coil consists of 30 turns of circular copper wire 2.2 mm in diameter. A uniform…

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

A:

Q: A 100-tum square coil of side 20.0 cm rotates about a vertical axis at 1.8 x10 rev/min as indicated…

A: Given, Number of turns N = 100 Side of coil L = 20 cm = 0.2 m Angular speed = 1.8 x 103 rev/ min =…

Q: A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 4.9 x103 rad/min as…

A: Faraday's law of induction states that an emf is induced in a coil when there is a change in the…

Q: A coil in a magnetic field encloses a flux of 0.0266 T·m2 when the angle between the normal to the…

A: Given- Flux ϕ= 0.0266 T·m2  The angle between the normal to the coil and the direction of the…

Q: A current of 6.87 A in a solenoid of length 12.6 cm creates a 0.337 T magnetic field at the center…

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Q: If a bar magnet is dropped through a conducting loop with its South pole downward as shown in the…

A: Given data If a bar magnet is dropped through a conducting loop with its South pole downward as…

Q: The magnetic flux of a coil will be positive maximum when, O a. magnetic field is antiparallel to…

A: Magnetic flux is given by the formula : flux (ϕ) = B×A×Cosθwhere B is the strength of magnetic field…

Q: A coil 4.35 cm radius, containing 460 turns, is placed in a uniform magnetic field that varies with…

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Q: A coil of wire is made of 520 turns and has an area of 0.30 m². It is placed in a uniform magnetic…

A: Given : Number of turns = 520 turns              Area A = 0.30 m2              Magnetic field B =…

Q: A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 2.8 x103 rad/min as…

A: The maximum induced emf is 3.73 mV.

Q: A circular loop of area 25 m2 encloses a magnetic field perpendicular to the plane of the loop; its…

A: Given data: area of circular loop, A  = 25 m2  magnetic field, B  = 10 t  capacitance of capacitor,…

Q: The armature of a small generator consists of a flat, square coil with 120turns and sides with…

A:

Q: A 227-turn circular coil of radius 24 cm is perpendicular to a uniform magnetic field of 0.55 T.…

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Q: A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 1.6 x10 rev/min as indicated…

A: Data Given ,  No. Of turns ( N ) = 100 Side of the coil ( l ) = 20 cm = 0.2 m So , area of the coil…

Q: A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 5.9 ×10 rad/min as indicated…

A: (given) Number of turns in the coil = 100               Side of square coil = 20 cm…

Q: 1.1- mm long rod rotates about an axis through one end and perpendicular to the rod, with an angular…

A:

Q: In the figure below, a metal bar sitting on 2 parallel conducting rails connected to each other by a…

A: Givens: Magnetic field, B=2.10 T Distance between the rails, l=1.2 m Resistance, R=9 Ω Current,…

Q: In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment,…

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Q: A 348 turn square coil of sides 25 am is placed in the earth's magnetic field 0.34 G, such that its…

A: Number of turns (N) = 348side of square coil (l) = 25 cm = 0.25 m Area of each turn of coil = l2=…

Q: U.) PP d.) a current in the CW direction to oppose the increasing north magnetic field. e.) no…

A: Please see the answer in step 2

Q: A conducting rod of length 40.0 cm is free to slide on two parallel conducting bars. A resistor…

A: Given, Length of the rod l = 40 cm Resistor R = 5 Ω Magnetic field B = 2.50 T Velocity v = 10 m/s

Q: A car has a vertical radio antenna 1.05 meters long. The car travels at 5.80 m/s on a horizontal…

A: The expression for the magnitude of induced emf is ε=vBlsinθ θ is the angle between the direction of…

Q: A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 4.8 ×103 rev/min as…

A:

Q: An emf is induced by rotating a 1070 turn, 20.0 cm diameter coil in the Earth's 4.95 ✕ 10−5 T…

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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.