Questions from Modern Physics

Q: A 0.180-H inductor is connected in series with

A 0.180-H inductor is connected in series with a 90.0-Ω resistor and an ac source. The voltage across the inductor is vL = -(12.0 V)sin[(480 rad/s)t]. a. Derive an expression for the voltage vR acros...

Q: A 250-Ω resistor is connected in series with a 4

A 250-Ω resistor is connected in series with a 4.80-µF capacitor and an ac source. The voltage across the capacitor is vC = (7.60 V)sin[(120 rad/s)t]. a. Determine the capacitive reactance of the cap...

Q: You have a 200-Ω resistor, a 0.400

You have a 200-Ω resistor, a 0.400-H inductor, and a 6.00-µF capacitor. Suppose you take the resistor and inductor and make a series circuit with a voltage source that has voltage amplitude 30.0 V and...

Q: A 150-Ω resistor is connected in series with a 0

A 150-Ω resistor is connected in series with a 0.250-H inductor and an ac source. The voltage across the resistor is vR =(3.80 V)cos[(720 rad/s)t]. a. Derive an expression for the circuit current. b...

Q: An electromagnetic wave with frequency 65.0 Hz travels in an

An electromagnetic wave with frequency 65.0 Hz travels in an insulating magnetic material that has dielectric constant 3.64 and relative permeability 5.18 at this frequency. The electric field has amp...

Q: An electromagnetic wave with frequency 5.70 * 1014 Hz propagates

An electromagnetic wave with frequency 5.70 * 1014 Hz propagates with a speed of 2.17 * 108 m/s in a certain piece of glass. Find a. the wavelength of the wave in the glass; b. the wavelength of a w...

Q: A horizontal, parallel- sided plate of glass having a refractive

A horizontal, parallel- sided plate of glass having a refractive index of 1.52 is in contact with the surface of water in a tank. A ray coming from above in air makes an angle of incidence of 35.0° wi...

Q: In an L-R-C series circuit, the rms

In an L-R-C series circuit, the rms voltage across the resistor is 30.0 V, across the capacitor it is 90.0 V, and across the inductor it is 50.0 V. What is the rms voltage of the source?

Q: A sinusoidal electromagnetic wave from a radio station passes perpendicularly through an

A sinusoidal electromagnetic wave from a radio station passes perpendicularly through an open window that has area 0.500 m2. At the window, the electric field of the wave has rms value 0.0400 V/m. How...

Q: The power of a certain CD player operating at 120 V rms

The power of a certain CD player operating at 120 V rms is 20.0 W. Assuming that the CD player behaves like a pure resistor, find a. the maximum instantaneous power; b. the rms current; c. the resi...