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NEET UG PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT
1
Medium
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Understanding
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A wire of length L is placed parallel to the lines
of force in a uniform magnetic field B. If I is
the current in the wire, then it will experience:
of force in a uniform magnetic field B. If I is
the current in the wire, then it will experience:
View answer and explanation
Correct option: D
no force
Option D (no force) is correct because the force on a current-carrying wire in a magnetic field is zero when the wire is parallel to the magnetic field.
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Which of the following statements is not true
A current loop in a magnetic field
Given below are two statements:
Statement (I): When currents vary with time, Newton’s third law is valid only if momentum carried by the electromagnetic field is taken into account.
Statement (II): Ampere's circuital law does not depend on Biot-Savart’s law.
In the light of the above statements, choose the correct answer from the options given below: The magnetic field due to current carrying a circular loop of radius at a point on the axis at a distance of from the center is . The magnetic field at the center of the loop is The magnetic field due to a small current element at distance and element carrying current is Three long straight conductors carry currents 4A, 2A and 3A into the plane of paper. A circular path is imagined to be enclosing these currents. The value of b is
Statement (I): When currents vary with time, Newton’s third law is valid only if momentum carried by the electromagnetic field is taken into account.
Statement (II): Ampere's circuital law does not depend on Biot-Savart’s law.
In the light of the above statements, choose the correct answer from the options given below: The magnetic field due to current carrying a circular loop of radius at a point on the axis at a distance of from the center is . The magnetic field at the center of the loop is The magnetic field due to a small current element at distance and element carrying current is Three long straight conductors carry currents 4A, 2A and 3A into the plane of paper. A circular path is imagined to be enclosing these currents. The value of b is