a) The magnetic field points out of the page and increasing. Explain. b) The magnetic field…
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Question “a) The magnetic field points out of the page and increasing. Explain. b) The magnetic field…”
a) The magnetic field points out of the page and increasing.
Explain.
b) The magnetic field points out of the page and is constant.
Explain.
c) The magnetic field points out of the page and decreasing.
Explain
Answer
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Solution:
Two things are required
First lenz’s Law acc. To which emf can be induced so that it opposes its cause.
Second right thumb rule: Your thumb should be directed along the magnetic field. The direction that your fingers curl is determined by the current in the loop.
(a) To oppose the magnetic field increase, a magnetic field must be created going the opposite direction to the direction of the increase. Then by right hand rule, the direction of the induced current will follow the clockwise direction.
(b) The magnetic field is constant, but the current can only be induced if this field magnitude changes. It depends on the rate of change. Therefore, no emf nor current can be inducible.
(c) To oppose the magnetic field change, a magnetic force must be moved out of the page in the direction of decrease. Then by right hand rule, the direction of Induced Current will be anticlockwise.
Conclusion
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