question_answer

A conductor in the form of a right angle ABC with AB = 3 cm and BC = 4 cm carries a current of 10 A. There is a uniform magnetic field of 5 T perpendicular to the plane of the conductor. The force on the conductor will be [MP PMT 1997]

A)            1.5 N                                        

B)            2.0 N

C)            2.5 N                                        

D)            3.5 N

Correct Answer: C

Solution :

                   According to the question figure can be drawn as shown below. Force on the conductor ABC = Force on the conductor AC              = 5 ´ 10 ´ (5 ´ 10?2) = 2.5 N