Since the plates are 2d apart, the magnitude of the charge on the plates and the potential difference between them are. Since the plates are 2d apart, the new capacitance and potential difference between the plates are a. Since the plates are 2d apart, the capacitance of the capacitor and the magnitude of the charge on the plates are a.
After the dielectric is added, the magnitude of the charge on the plates and the potential difference between them. After adding the dielectric, the magnitude of the charge on the plates and the new capacitance. After the dielectric is added, the magnitudes of the charge on the plates and the potential difference between them.
After the dielectric is added, the magnitudes of the capacitance and potential difference between the plates are equal. The magnitude of the electric field outside the space between the plates is approximately zero.
Current and Resistance
Direct Current Circuits
Magnetic Fields
Which of the following statements about the magnetic field at point P can be determined from this data. The charge that moves if its velocity makes an angle of 45o with the direction of the magnetic field when it is released. A positively charged particle that begins to move parallel to the earth's surface in a straight line directed east is initially deflected upwards.
In position 2 and 3, the plane of the loop is parallel to the field as shown. The direction of the path depends on the magnitude of the velocity, not the sign of the charge. If the coaxial cable lies in a uniform magnetic field directed upwards with respect to the cable, the effect of the field on the cable is the same.
When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is Point P lies along the perpendicular bisector of the line joining two long straight wires S and T that are perpendicular to the face. When the two equal currents in the wire are directed up out of the page, the direction of the magnetic field at P is closer to the direction of e.
Point P lies along the perpendicular bisector of the line connecting two long straight wires S and T perpendicular to the face. When the two equal currents in the wire are directed face to face, the direction of the magnetic field at P is closer to the direction of e. If no magnetic material were installed on the north or south walls of the room, she would expect that a.
Finally, Rita says that you can take the north pole of a magnet up to the wire and determine the current direction from the direction of the magnetic force on the wire. Bert says that a charged particle in a vacuum can travel in a coil only if a uniform electric field and a uniform magnetic field are present and both parallel to the axis of the coil. Stuart says that only a magnetic field with a component parallel to the axis of the coil is needed.
Sources of the Magnetic Field
Faraday’s Law
A bar magnet falls from above and falls through the wire loop shown below. The north pole of the bar magnet points down toward the page as it falls. No current flows in the loop because both ends of the magnet move through the loop.
A metal rod of length L in a region of space where a constant magnetic field points into the page rotates clockwise about an axis through its center at constant angular velocity. A metal rod of length L in a region of space where a constant magnetic field points into the page rotates about an axis through its center at constant angular velocity. Two light bulbs are shown in a circuit surrounding a region of increasing magnetic field directed out of the page.
As shown below, a square loop of wire of side a moves through a uniform magnetic field of magnitude B perpendicular to the face at constant speed. Which statement about the electric field induced in the wire is true for the wires on the left and right sides of the loop. It goes up on the right side and down on the left side of the loop.
E is directed upward in the left side and downward in the right side of the loop. Starting outside the region with the magnetic field, a single square coil of wire moves across the region with a uniform magnetic field. In which direction did the loop move across the plane of the page, or is Martin correct.
Starting outside the region of magnetic field, one square coil of wire enters, moves across, and then exits the region of uniform magnetic field perpendicular to the side, so the graph below represents the induced B emf.
Inductance
After a switch is thrown to remove the battery from a DC LR circuit, but the circuit is still left complete, represents the time constant.
Interference of Light Waves
An interference pattern is produced at point P on a screen as a result of direct rays and rays reflected from a mirror as shown in the figure. If the source is 100 m to the left of the screen, 1 cm above the mirror, and the source is monochromatic ( = 500 nm), find the conditions for minimum brightness on the screen in terms of , and d. A plane cross-section through two spherical waves emanating from sources S1 and S2 in the plane are shown in the figure.
If the waves shown arriving at P1 both arrive with amplitude A, the resulting amplitude at point P1 is If the waves shown arriving at P2 both arrive with amplitude A, the resulting amplitude is at point P2. If the phase at S1 and S2 is zero at this instant, and the waves shown arriving at P1 both arrive with amplitude A, the phase angle of each wave at point P1 (in radians) is
If the phase at S1 and S2 is zero at this time, and the waves shown arriving at P2 both arrive with amplitude A, the difference in phase angle at point P2 (in radians) is When a central dark fringe is observed in reflection in a circular interference pattern, waves reflected from the upper and lower surfaces of the medium must have a phase difference, in radians, of The superposition of two waves E1E0sin(t) and E2E0sin(t) arriving at the same point in space at the same time is E.
Stacy, because the difference in time of travel from the source to the slits is no more than about 71012 s.. The locations of bright and dark fringes can be interchanged if a thin film is placed in front of one of the slits. Each bright fringe will shift to the location of the adjacent bright fringe if a thin film is placed in front of one of the slits.
When illuminated with monochromatic light of wavelength , we can see a clear double-slit interference pattern of approximately equal intensity for at least a dozen centrally located fringes only if. The distances from the screen to the slots are the same for each figure, and the planes of the screen and slots are parallel.
Answers
