Question Detail

PHY 102 Electromagnetic Induction 2 Objective Question
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Question

According to the document, what happens when a horizontal magnetic field is applied externally to a conductor that also has a magnetic field due to current flowing through it?
Options
A The two magnetic fields cancel each other out, resulting in no net force.
B The two magnetic fields interact, leading to a force that moves the conductor from a more concentrated magnetic field to a less concentrated one.
Correct Answer
C The externally applied field dominates, causing the conductor to align with it regardless of its own current-induced field.
D The conductor's field dominates, preventing the external field from having any significant effect.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 19 and 20 explain that the external magnetic field and the magnetic field due to the current in the conductor will interact. Where they are in the same direction, there is a larger concentration of magnetic lines of force, and where they are opposite, there is less. This leads to a force that moves the conductor from the more concentrated region to the less concentrated region, as stated on page 20: 'As a result, there will be a force which will tend to move the conductor from the more concentrated magnetic field to less concentrated magnetic field, that is from the present position to downwards.'

Hint

Consider the effect of magnetic field lines concentrating on one side of the conductor.

Question Info

Course: PHY 102
Topic: Electromagnetic Induction 2
Type: Objective
Difficulty: Not specified
Question 758 of 1819
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