In which direction is the current induced in the loop for each situation in the

Question

In which direction is the current induced in the loop for each situation in the figure below. Justify your answer in each case in order to earn full credit. Simply stating the direct will not suffice. Shrinking a loop in a magnetic field pointing into the page 1 81 S magnetic pole moving toward loop into the page Rotating the loop by pulling the left side toward you and pushing the right side in; the magnetic field points from right to left Find the range in wavelengths for visible light in the frequency range between 4.0 Times 10^14 Hz and 7.9 Times 10^14 Hz. Two EM waves propagate in a certain medium such that the frequency of Wave A is twice that of wave B. How does the wavelength of wave A compares to that of wave B? How long should a half wavelength antenna be for an aircraft radio operating at 75MHz? Diffraction is the ability of a wave to bend around an obstacle or the edges of an opening. Would you expect AM or FM radio waves to bend more readily around an obstacle such as a building? Radiation from the sun reaches the earth (above the atmosphere) at an average rate of about 4850J/s.m^2 =4850W/m^2). Assume that this is a single EM wave. Calculate the root mean square values of the magnetic field strength. If both the E- & B-fields of an EM wave doubles in magnitude, how does the intensity of the wave change? Sunlight enters the top of the earth's atmosphere with a electric field whose rms value is 720N/C. Find The average total energy density of this electromagnetic wave and The rms value of the sunlight's magnetic field Consider a tiny source that is emitting light uniformly in all directions. At a distance of 2.50m from the source, the rms electric field strength of light is 19.0N/C. Assuming that the light does not reflect from anything in the environment, determine the average power of the light emitted by the source. Also assume that that the source illuminates a surface in the form of a sphere.

Explanation / Answer

A) ClockWise

The magnetic flux through the loop is decreasing, so the induced B field must try to reinforce it and therefore points in
the same direction — into the page.

According to the right-hand rule, an induced clockwise current will generate a magnetic field into the page.

B) ClockWise

C) CounterclockWise

As the coil is rotated into the B field, the magnetic flux through it increases.

According to Lenz’s Law, the induced B field has to oppose this increase, thus the new B field points to the right.

An induced counterclockwise current produces just such a B field.

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