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Chapter 23: Electromagnetic Induction, AC Circuits, and Electrical Technologies

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大学物理(Urone)
Pages: 817 - 864
大学物理(Urone)

大学物理(Urone)

Book edition 1st Edition
Author(s) Paul Peter Urone
Pages 1272 pages
ISBN 9781938168000

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Illustration

135 Questions for Chapter 23: Electromagnetic Induction, AC Circuits, and Electrical Technologies

  1. The lowest frequency in the FM radio band is 88.0 MHz. (a) What inductance is needed to produce this resonant frequency if it is connected to a 2.50pFcapacitor? (b) The capacitor is variable, to allow the resonant frequency to be adjusted to as high as 108 MHz. What must the capacitance be at this frequency?

    Found on Page 864

  2. An RLC series circuit has a 2.50Ωresistor, a 100μHinductor, and a 80.0μFcapacitor. (a) Find the circuit's impedance at120Hz. (b) Find the circuit's impedance at5.00kHz. (c) If the voltage source has Vrms=5.60V, what isIrmsat each frequency? (d) What is the resonant frequency of the circuit? (e) What isIrms

    Found on Page 864

  3. An RLC series circuit has a 1.00kΩ resistor, a 150μH inductor, and a 25.0nF capacitor. (a) Find the circuit's impedance at 500Hz . (b) Find the circuit's impedance at 7.50kHz . (c) If the voltage source has Vrms=408V , what isIrmsat each frequency? (d) What is the resonant frequency of the circuit? (e) What is Irmsat resonance?

    Found on Page 864

  4. An RLC series circuit has a \(2.50\;\Omega \) resistor, a \(100\;\mu H\) inductor, and an \(80.0\;\mu F\) capacitor. (a) Find the power factor at \(f = 120\;Hz\). (b) What is the phase angle at \(120\;Hz\)? (c) What is the average power at \(120\;Hz\)? (d) Find the average power at the circuit's resonant frequency.

    Found on Page 864

  5. An RLC series circuit has a \(1.00\;k\Omega \) resistor, a \(150\;\mu H\) inductor, and a \(25.0\;nF\) capacitor. (a) Find the power factor at \(f = 7.50\;Hz\). (b) What is the phase angle at this frequency? (c) What is the average power at this frequency? (d) Find the average power at the circuit's resonant frequency.

    Found on Page 864

  6. An RLC series circuit has a200Ωresistor and a 25.0mHinductor. At 8000Hz, the phase angle is 45.0∘. (a) What is the impedance? (b) Find the circuit's capacitance. (c) IfVrms=408Vis applied, what is the average power supp

    Found on Page 864

  7. Referring to Example 23.14, find the average power at \({\rm{10}}{\rm{.0}}\;{\rm{kHz}}\).

    Found on Page 864

  8. Integrated Concepts Referring to the situation in the previous problem: (a) What current is induced in the ring if its resistance is 0.0100 Ω? (b) What average power is dissipated? (c) What magnetic field is induced at the center of the ring? (d) What is the direction of the induced magnetic field relative to the MRI’s field?

    Found on Page 860

  9. An\({\rm{emf}}\)is induced by rotating a\({\rm{1000 - }}\)turn,\({\rm{20}}{\rm{.0 cm}}\)diameter coil in the Earth’s\({\rm{5}}{\rm{.00 \times 1}}{{\rm{0}}^{{\rm{ - 5}}}}{\rm{ T}}\)magnetic field. What average\({\rm{emf}}\)is induced, given the plane of the coil is originally perpendicular to the Earth’s field and is rotated to be parallel to the field in\({\rm{10}}{\rm{.0 ms}}\)?

    Found on Page 860

  10. A\({\rm{0}}{\rm{.250 m}}\)radius,\({\rm{500}}\)-turn coil is rotated one-fourth of a revolution in\({\rm{4}}{\rm{.17 ms}}\), originally having its plane perpendicular to a uniform magnetic field. (This is\({\rm{60 rev/s}}\).) Find the magnetic field strength needed to induce an average emf of\({\rm{10,000 V}}{\rm{.}}\)

    Found on Page 860

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