Explain the difference between the magnetic field B and the magnetic flux Phib o

Question

Explain the difference between the magnetic field B and the magnetic flux Phib of a magnetic field. In what units may each be expressed? How are these units related? The magnetic field is the component of the magnetic field within passes through a surface. Formula: 1WB=1T(m2) Define Lenz's Law. If B field is decreasing into the plane and a circular coil is on the plane, what is the direction of induced current flow through the coil? Lenz's law is the current caused by the inveed emf travels in the direction that creates a magnetic field with flux opposing the change in the original flux through the circuit. If the induced voltage is 0.5 V as B field is decreasing at a rate of 0.5 T/s in a loop described in question 2, calculate the area of the loop. Let a coil wand pendulum start swinging with an angle of 30 degree with the vertical in a similar setup of Activity 2-1. After it passes through the magnet gap, the pendulum rises to a level which makes 20 degree with the vertical. If the length from the center of mass of the pendulum to the pivot is 30 cm, (a) calulate the heights of the pendulum at the start and final positions (b) what is the energy lost by the pendulum? Assume the mass of the pendulum be 80 grams.

Explanation / Answer

The answer to the 3rd question:

A = (emf)/(dB/dt)

A = (0.5)/(0.5) = 1m^2

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