Week 8 Problem 5
The figure below is a graph of the magnetic flux through a certain coil of wire as a function of time during an interval while the radius of the coil is increased, the coil is rotated through 1.5 revolutions, and the external source of the magnetic f......
Week 8 Problem 8
The flexible loop in the figure below has a radius of em and is in a magnetic field of magnitude T. The loop is grasped at points A and 8 and stretched until its area is nearly zero. If it takes s to close the loop, what is the magnitude of theaverag......
Week 8 Problem 4
For a research project, a student needs a solenoid that produces an interior magnetic field of T. She decides to use a current of A and a wire mm in diameter. She winds the solenoid in layers on an insulating form em in diameter and em long....
Week 8 Problem 1
The figure below is a cross -sectional view of a coaxial cable. The center conductor is surrounded by a rubber layer, an outer conductor, and another rubber layer. I n a particular application, the current in the inner conductor is It = A out of the......
Week 8 Problem 2
The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius of mandan outer radius of m . The toroid has turns of large-diameter wire, each of which carries a current of kA....
Week 9 Problem 8
Two coils are placed near each other as shown in the figure below. The coil on the left is connected to a battery and a switch, and the coil on the right is connected to a resistor....
Week 8 Problem 9
To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest. The belt is a -turn coil. When the patient inhales, the area encircled by the coil increases by cm2 The magnitude of the Earth's magnetic field is ~T an......
Week 6 Problem 8
Four capacitors are connected as shown in the figure below. (Let C = uF)Find the equivalent capacitance between points a and bCalculate the charge on each capacitor, taking Vab = V...
Week 8 Problem 10
The figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is R = n, and a -T magnetic field is directed perpendicularly downward, into the page. Let t = m ....
Week 8 Problem 6
A flat coil of wire is placed in a uniform magnetic field that is in the y direction....
Week 8 Problem 11
The figure below shows a bar of mass m = kg that can slide without friction on a pair of rails separated by a distance f = m and located on an inclined plane that makes an angle ° with respect to the ground. The resistance of the resistor is R= an......
Week 8 Problem 7
Use Lenz's law to answer the following questions concerning the direction of induced currents. Express your answers in terms of the letter labels a and b in each part of the figure below...
Week 13 Problem 5
(a) An electron has kinetic energy eV. Find its wavelength.{b) A photon has energy eV. Find its wavelength....
Week 5 Problem 10
The figure below represents a graph of the electric potential in volts in a region of space versus position x, where the electric field is parallel to the x axis, which is shown in cm....
Week 10 Problem 5
Transverse waves are being generated on a rope under constant tension. Determine the factor by which the required power is changed in each of the following situations....
Week 6 Problem 5
For the circuit shown below, the ideal voltmeter reads V and the ideal ammeter reads mA. Find the following.The value of RThe emf of the batterThe voltage across the resistor...
Week 5 Problem 7
Three point charges are arranged as shown in Figure P23.19....
Brillant.org Problem of the Week 5
We're using an indirect proof to find the solution to this divisibility problem....
Problem of the Week (#5-2018)
The task: a quadratic equation is given with non-zero roots. Prove that an expression (formed with the coefficients of the equation) is always a composite number....