The power lines that run through your neighborhood carry alternating currents that reverse direction 120 times per second. As the current changes, so does the magnetic field around a line. Suppose you wanted to put a loop of wire up near the power line to extract power by “tapping” the magnetic field. Sketch a picture of how you would orient the coil of wire next to a power line to develop the maximum emf in the coil. (Note that this is dangerous and illegal, and not something you should try.)

Q: A Generator Bike. You and your team are designing a generator using a stationary bike to rotate a…

A: The peak emf (ε) produced by the generator bike can be calculated using Faraday's law of…

Q: Suppose that the light bulb in Figure 22.4b is a 60.0-W bulb with a resistance of 287 Ω. The…

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Q: To make an electric generator, a 142-turn square coil of side 20.0 cm rotates about a vertical axis…

A: Write the given values with the suitable variables. N=142a=20 cm=0.2 mω=25 rev/s=50π rad/sB=0.7…

Q: A 20-cm-diameter circular loop of wire is placed in a 0.72-T magnetic field. 1) When the plane of…

A: Given that:Diameter, D=20 cmRadius, R=D/2=10 cm=0.10 mMagnetic field, B=0.72 T

Q: Suppose you rotate a 1000 turn, 22 cm diameter coil in the Earth’s 5.00 × 10-5 T magnetic field.…

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Q: The drawing shows a type of flow meter that can be used to measure the speed of blood in situations…

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Q: If the change in magnetic field is 0.3T in 0.2s as shadow walks through the coils, does the trap…

A: The current induced in the coil can found by Ohm’s law as, Here, ε, i, and R represent the induced…

Q: There is a circular conducting loop with diameter = 8 cm that has 400 turns that is placed in a…

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Q: To scan a patient, you need a magnetic filed of 0.4 Tesla. You have a solenoid of length 0.08 meters…

A: Numbers of turn = 1500 Magnetic field (B) = 0.4 T Length = L = 0.08 m

Q: You are designing a generator to be run with a wind turbine that rotates at 6.67 rad/s. You are…

A: Faraday performed experiments to check whether current is produced in a closed wire when placed in a…

Q: A 105-turn square wire coil of area 0.040 m2 rotates about a vertical axis at 1,800 rev/min, as…

A: GIVEN,  area= 0.040 m^2 ω=1800 revmin*1min 60 sec×2π rad1 rev=188.5 red/sec   B=2.0 ✕ 10−5 T N=105

Q: A circular coil enclosing an area of 160 cm² is made of 210 turns of copper wire (shown in the…

A: The area of the circular coil is  A=160 cm2 =160 cm2×1 m100 cm2 =1.60×10-2 m2 Resistance of the coil…

Q: The 1200-turns coil in a dc motor has an area of 1.5 ×10–2 m2. The design for the motor specifies…

A: number of turns in coil , N = 1200 turns  Area A = 1.5 * 10-2 m2  Maximum Torque τ = 7.2 Nm…

Q: In the figure below, a uniform magnetic field decreases at a constant rate dB/dt = –K, where K is a…

A: (a) The charge on the capacitor, when it is fully charged. As the magnetic field is directed into…

Q: Suppose you wish to measure the current in a wire. You have a device that can measure the strength…

A: Given:-  The  magnitude of the magnetic field is B = 1.72 μ T  The magnetic field B is r = 0.98 m…

Q: A circular coil enclosing an area of 120 cm² is made of 190 turns of copper wire (shown in the…

A: The area of the circular coil is Resistance of the coil is number of  turns in the coil, The…

Q: A 105-turn square wire coil of area 0.040 m2 rotates about a vertical axis at 1,800 rev/min, as…

A: Emf induced in the coil ε=dϕdt=ddtNBAcosθ=NBAωsinθ            ω=dθdtεmax=NBAω            sinθmax=1

Q: A rectangular coil with sides 0.120 m by 0.210 m has 495 turns of wire. It is rotated about its long…

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Q: You are to build an electromagnet with 0.643-mm- diameter copper wire. To create the required…

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Q: The loop in the figure is being pushed into the 0.20 TT magnetic field at 50 m/sm/s. The resistance…

A: Magnetic field B = 0.20 T.Velocity is given as, v = 50 m/s.Resistance of the loop Width of the loop…

Q: Suppose you rotate a 1000 turn, 19 cm diameter coil in the Earth’s 5.00 × 10-5 T magnetic field.…

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Q: Two circular loops of wire surround an insulating rod as in Figure P20.53. Loop 1 carries a current…

A: Right hand rule gives the direction of magnetic field due to the flow of current. For the loop, when…

Q: Consider a straight conductor of length 6.3 cm. The conductor moves at right angles to a magnetic…

A: length of conductor,l=6.3 cm=6.3 x 10-2 mmagnetic field strength, B=10-3 Te.m.f. = 2.5 x 10-5…

Q: Suppose you wish to measure the current in a wire. You have a device that can measure the strength…

A: Given data:  Distance (r) = 1.32 m Strength of magnetic field (B) = 0.93 μT = 0.93×10-6 T Required:…

Q: A 100-turn square wire coil of area 0.040 m2 rotates about a vertical axis at 1,450 rev/min, as…

A: Coil of area (A) = 0.040 m2 Number of turns (N) = 110  Angular frequency (ω) = 1450 rev/min = 1450…

Q: resistor R is connected between two parallel conducting rails separated by 39 cm, as shown in the…

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Q: 5. A circular loop is constructed from a flexible, conducting wire of resistance R. The wire is…

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Q: A cyclotron accelerates charged particles as shown in the figure. The magnetic field contains the…

A: Given: The magnetic field intensity (B) = 1.35 T. The charge on proton (q) = 1.6×10-19 C  Mass of…

Q: Pr1. The figure shows the cross-section of a long, straight, cylindrical coil (solenoid) of radius r…

A: The magnetic field in solenoid's core is along the axis of solenoid and is given by,…

Q: A circular loop of wire, consisting of 35 turns on a 12 cm radius, is moving at a speed v = 20 cm/s…

A: By Ampere's law, ε=-Ndφdt=-NBAω cosθ

Q: There are a lot of numbers in this problem. Just about the only way to get it right is to work out…

A: Given Distance between the center of the coils z = 0.18 m Coil 1 turns N1…

Q: Currents in dc transmission lines can be 100 A or higher. Some people are concerned that the…

A: current in the line = I=130 Adistance of the ground from the line =r= 8 m

Q: What is the current i, through the wire coil before the coil reaches the right edge of the field?…

A: Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.