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JEE PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT
1
Medium
1 of 1
Understanding
+4 | -1
Given the fact that
A) Magnetic field exerts force only on a moving
charge
B) Electric field exerts force on both stationary
and moving charge
C) Magnetic field exerts force on charge moving
parallel to the direction of the field.
Which of the following is true?
A) Magnetic field exerts force only on a moving
charge
B) Electric field exerts force on both stationary
and moving charge
C) Magnetic field exerts force on charge moving
parallel to the direction of the field.
Which of the following is true?
View answer and explanation
Correct option: B
A and B
Option B is correct because magnetic fields exert force only on moving charges, and electric fields exert force on both stationary and moving charges.
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Assertion: If a charged particles is moving in perpendicular uniform magnetic field, its kinetic energy does not change
Reason: Velocity of charge particle is not changing in magnetic field. Pick out the wrong statement : A steady current is flowing in a circular coil of radius , made up of a thin conducting wire. The magnetic field at the center of the loop is . Now, a circular loop of radius is made from the same wire without changing its length, by unfolding and refolding the loop, and the same current is passed through it. If new magnetic field at the center of the coil is , then the ratio is Lorentz force can be calculated by using the formula Two particles and having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular path of radius and respectively. The ratio of mass of to that of is :
Reason: Velocity of charge particle is not changing in magnetic field. Pick out the wrong statement : A steady current is flowing in a circular coil of radius , made up of a thin conducting wire. The magnetic field at the center of the loop is . Now, a circular loop of radius is made from the same wire without changing its length, by unfolding and refolding the loop, and the same current is passed through it. If new magnetic field at the center of the coil is , then the ratio is Lorentz force can be calculated by using the formula Two particles and having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular path of radius and respectively. The ratio of mass of to that of is :