What is the direction of the magnetic field at the center( point P) of the square loop of current? Screen Shot 2022-08-11 at 2.16.28 PM.png 

In each element of a series LCR Circuit

A wire is carrying current vertically downward. What is the direction of the force on this wire due to Earth’s magnetic field?

You are standing on a sidewalk. There is a car in the distance. The horn on the car sounds. You hear it at a pitch that corresponds to a sound frequency lower than the frequency emitted by the horn. What can you conclude?

An electron moves with a speed of 5.0 × 10 4 m/s perpendicular to a uniform magnetic field of magnitude 0.20 T. What is the magnitude of the magnetic force on the electron? ( e = 1.60 × 10 -19 C)

A parallel plate capacitor initially has a voltage of 400 V and stays connected to the battery. If the plate spacing is now doubled, what happens?

The length of a guitar’s fundamental wavelength is

Which of the following inductors has the largest magnitude of the voltage across the inductor? In each case the direction of the current does not change.

A rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a magnetic field with a strength of 0.40 T, as shown in the figure. The length of the loop  L is 0.16 m and its width  w is 0.040 m. What is the magnetic flux through the loop when the plane of the loop makes an angle of 60° with the magnetic field?

A pipe that is 0.92 m long and open at both ends vibrates in the second overtone with a frequency of   What is the speed of sound in the air in this pipe?