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Study the given information. Consider the force on a current carrying straight conductor in a magnetic field. (i) It is perpendicular to the direction of current. (ii) It is perpendicular to the magnetic field. (iii) Its direction can be found using right-hand thumb rule. Select the correct option.

A.
All (i), (ii) and (iii) are correct
B.
Both (i) and (ii) are correct
C.
Only (i) is correct
D.
Only (ii) is correct

Solution:

The correct answer is Both (i) and (ii) are correct.Concept:Magnetic field (B):The area around a magnet where a magnetic force is experienced is called the magnetic field.It is a quantity that has both direction and magnitude, (i.e., Vector quantity).Explanation:A current carrying conductor placed in a magnetic field experiences a force.If the direction of the field and that of the current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both,The direction of the force can be determined using the Flemings left-hand rule.?It is perpendicular to the direction of the current. True It is perpendicular to the magnetic field. TrueIts direction can be found using the right-hand thumb rule.FalseAdditional Information Flemings left-hand rule:According to Fleming's left-hand rule, if the thumb, forefinger, and middle finger of the left hand are stretched to be perpendicular to each other as shown in the illustration at left, and if the forefinger represents the direction of the magnetic field, the middle finger represents the direction of the current, then the thumb represents the direction of the force.

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