High voltage transmission line Step-down transformer Step-down (substation) transformer Power plant Step-up transformer Home 12,000 V 240,000 V 7200 V 240 V FIGURE 21-25 The transmission of electric power from power plants to homes makes use of transformers at various stages.

Q: 1) If the electrical power lines in a certain neighborhood deliver electricity at 72,000 volts,…

A: Primary voltage Vp = 72000 volts Secondary voltage Vs = 120 volts

Q: 2) A standard motional emf setup in the xy consists of a constant, uniform magnetic field which…

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Q: (23%) Problem 4: Consider a transformer, used to recharge rechargeable flashlight batteries, that…

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Q: A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage…

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Q: 16) A (00 turn of 0.(00 m². The coil encloses cir cumtere ntial loil an are a has a resistance of 10…

A: Calculate the total magnetic field. Calculate the magnetic flux.

Q: A transmission line that has a resistance per unit length of 4.30 x 104 n /m is to be used to…

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Q: ideal transformer,

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Q: )An tdial section has an flows through the 2.0v in the Sole the current fo

A: Here, we have to calculate the rate of change of current.

Q: A long radius R the number solenoid has and of turns per unit of leng th is n. An increasing current…

A: Magnetic field inside a solenoid is given by B=u⁰nI

Q: A square loop circuit (with a 30.0 V battery, resistance of 6.00 ohms and side length of 2.00 m) is…

A: Force on a current carrying conductor in a magnetic field is given as  F = I (LxB) Where L is length…

Q: (L11) To store 9.19E-3 J energy in a 7.09E-3 H inductor, what charging current should be applied to…

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Q: half O A tectangular conducting loop has its left in a magnetic field directed into the page. S…

A: when we increase the magnetic field in the page so Loop pused itself on the right side because it…

Q: 25-16. A transformer draws power P and delivers a current I, in its secondary coil. (a) What is the…

A: Power = potential×current P=V×I

Q: 4) A solenoid with a radius of 15 cm and 150 loops is placed in a B field of 45 T. The B field drops…

A: radius, r=0.15 mnumber of turns, n=150magnetic field, B=45 Ttime, t=2 min           =120 sec

Q: Why can a hum usually be heard when a transformer is operating?

A: A transformer is a device which is used to convert high to low and low to high ac voltages.

Q: Can there be an induced emf in a circuit at an instant when the magnetic flux through the circuit is…

A: Faraday's Law gives us the concept of the induced emf being equal to the rate of change of magnetic…

Q: The figure below shows a conducting bar of mass m 0.200 kg that can slide without friction on a pair…

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Q: A bar is moved along conducting rails at a constant 2.0 m/s in the presence of a 1-tesla magnetic…

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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.