A compass needle free to turn in a horizontal plane is placed at the centre of circular coil of 30 turns and radius 12 cm. The coil is in a vertical plane making an angle of 45° with the magnetic meridian. When the current in the coil is 0.35 A, the needle points west to east. (a) Determine the horizontal component of the earth’s magnetic field at the location.(b) The current in the coil is reversed, and the coil is rotated about its vertical axis by an angle of 90° in the anticlockwise sense looking from above. Predict the direction of the needle. Take the magnetic declination at the places to be zero.

Q: A horizontal rod 0.200 m long is mounted on a balance and carries a current. At the location of the…

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Q: Calculate the magnitude of the magnetic field from a circular loop of wire of radius 0.17 m,…

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Q: The figure shows a rectangular, 23-turn coil of wire, of dimensions 11 cm by 5.8 cm. It carries a…

A: Given Information: The number of turns is N = 23 The cross section area of the wire is A=0.11…

Q: Consider the current-carrying wire shown in the figure. The current creates a magnetic field at the…

A: magnetic field at center only due to circular arc B = μ0I/2R(θ/360°) B =  μ0I/2R(30/360°)

Q: A circular loop of radius 10 cm, carrying a current of 0.60 A , is placed inside a magnetic field…

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Q: contains only a uniform magnetic field and experiences a vencally upward force Which of the…

A: according to fleming lefthand rule from given data proton move due east along middle finger…

Q: A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is…

A: Given Data:-      A=0.10 m×0.10 m      A=0.01 m2      N=20      I=12 AmP      θ=30°      B=0.80…

Q: A "long" solenoid of length 1.61 m has radius 7.24 cm, 6,303 turns and carries current 94.7. Now a…

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Q: A long piece of wire of mass 0.100 kg and total length of 4.00 m is used to make a square coil with…

A: Given data: Mass of the wire, m=0.100 kg Length of the wire, L=4.00 m Side of the coil, a=0.100 m…

Q: A 48.5-turn circular coil of radius 4.70 cm can be oriented in any direction in a uniform magnetic…

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Q: The force on a magnetic dipole mu aligned with a nonuniform magnetic field in the x direction is…

A: a. Consider a point at x a distance from one ring, then the distance of this point from the second…

Q: The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius…

A: Inner radius of the toroid is equal to 0.7 metre  Outer radius of the toroid is equal to 1.3 m…

Q: An electron moves in a circle of radius r = 6.65 × 10-11 m with a speed 2.87 × 106 m/s. Treat the…

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Q: A Gaussian surface in the shape of a right circular cylinder with end caps has a radius of 15.1 cm…

A: The magnetic flux through the closed surface is zero.   The addition of the flux through the two…

Q: Point P is midway between two long, straight, parallel wires that run north-south in a horizontal…

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Q: A flat circular coil of wire having 400 turns and diameter 6.0 cm carries a current of 7.0 A. It is…

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Q: A nearly horizontal dc power line in the midlatitudes of North America carries a current of 1000 A…

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Q: a rectangular coil of wire consisting of ten loops each with length 0.20 m and width 0.30 m, lies in…

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Q: A Gaussian surface in the shape of a right circular cylinder with end caps has a radius of 12.0 cm…

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Q: a rectangular 20-turn coil of wire, of dimensions 10 cm by 5.0 cm. It carries a current of 0.10 A…

A: The force is perpendicular to the bottom of the coil and is x away from the hinge. Thus, expression…

Q: Within the green dashed circle shown, the magnetic field changes with time according to the…

A: The magnetic field  B = 2.00t3 - 4.00t2 +8.00 Since the magnetic field varies with time an induced…

Q: A circular conducting loop with radius 5.80 cm is placed in a uniform magnetic field of 0.780 T with…

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Q: A circular loop carrying a current of 1.25 A is oriented in a magnetic field of 0.22 T. The loop has…

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Q: 0.600 m اے T - 0.800 m B R You have a right triangular coil with base of 0.800 m and height 0.600 m…

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Q: Two long, parallel wires carry currents of I1 = 2.90 A and I2 = 4.70 A in the directions indicated…

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Q: A 100 turn circular coil of radius 40 cm is placed in the earth's magnetic field 0.39 G, such that…

A: Using relation of potential energy , torque and dipole moment we find

Q: Two very long wires are parallel to the z axis, as shown in the figure. Each carries a current,…

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Q: The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius…

A: Given: Inner radius of the toroid ri = 0.700 m outer radius of toroid ro = 1.30 m number of turns of…

Q: The closed loop shown in the figure below carries a current 4 A in the clockwise direction. The loop…

A: The magnetic field at a point on the axis of a straight current carrying conductor is zero because…

Q: A rectangular coil consists of N=10 closely wrapped turns and has dimensions a = 0.400 m and b=0.300…

A: torque on a current carrying loop in a magnetic field is given by: tau = N*I*A*B*sin theta N =…

Q: A closed loop of an irregular shape is placed in a region of uniform magnetic field of magnitude…

A: Let B denotes the magnetic field, l denotes the length and i denotes the current.

Q: A uniform magnetic field is 0.12 H towards the east, so a proton rotates in the field at a speed of…

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Q: A 1000-turns coil encloses a rectangular area of dimensions 38.0 cm and 28.0 cm. The coil lies in…

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Q: A horizontal compass is placed 18cm due south from a straight vertical wire carrying a 48A current…

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Q: Why is the following situation impossible? Imagine a copper wire with radius 1.00 mm encircling the…

A: The expression for resistance is

Q: At a site where the Earth's magnetic field has a magnitude of 0.47 gauss (where 1 gauss = 1.00 x…

A: Solution , Given, Magnetic field = 0.47 gauss = 0.47 x 10-4 T Length of high voltage power line =…

Q: A rectangular coil with sides 5 cm x 2 cm and 20 turns is placed vertically in a uniform horizontal…

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Q: · A 50 cm horizontal straight wire is place in a uniform magnetic field of magnetic field strength…

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Q: A 50.0-turn circular coil of radius 5.00 cm can be oriented in any direction in a uniform magnetic…

A: It is given that, N=50r=5 cm=0.05 mB=0.5 TI=25 mA=25×10-3 A

Q: A wire carrying a current is  shaped in the fom of a circular loop of radius 4.0 mm.  If the…

A: A wire carrying a current is shaped in the fom of a circular loop  So magnetic field at centre is B…

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.