At t = 0, an emf of 500 V is applied to a coil that has an inductance of 0.800 H and a resistance of 30 2. a) Find the energy stored in the magnetic field when the current reaches % of its maximum value. b) After the emf is connected, how long does it take the current to reach this value?

At t = 0, an emf of 500 V is applied to a coil that has an inductance of 0.800 H and a resistance of 30 2. a) Find the energy stored in the magnetic field when the current reaches % of its maximum value. b) After the emf is connected, how long does it take the current to reach this value?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter24: Electromagnetic Waves

Section: Chapter Questions

Problem 5PE: Verify the units obtained for magnetic field strength B in Example 24.1 (using the equation B=Ec )...

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Concept explainers

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.

Question

8. Att = 0, an emf of 500 V is applied to a coil that has an inductance of 0.800 H and a
resistance of 30 2.
a) Find the energy stored in the magnetic field when the current reaches ½ of its maximum
value.
b) After the emf is connected, how long does it take the current to reach this value?

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