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# Objective questions of magnetic effect of current

this assignment contains all important objective type  questions of  magnetic effect of current . Students preparing for 12th board examination or other competitive examination  like JEE/NEET.

Before to solve objective questions of this chapter student may solve the objective questions of electric current. To download assignment of objective questions of electric current click here-

1. Magnetic induction is measured in:
•  (a)weber (b) weber/m     (c) weber/m2      (d) weber/m3
1. The force acting on a charge q moving with a velocity ʋ in a magnetic field of induction B is given by:
• (a) q/(ʋ ₓ B) (b) (ʋ ₓ B)/q      (c) q/(ʋ ₓ B)         (d) (ʋ . B)q
1. Two free parallel wire carrying currents in the opposite directions:
• (a)attract each other
• (b)repel each other
• (c)do not affect each other
• (d)get rotated to be perpendicular to each other
1. Two parallel wires carrying currents in the same direction attract each other because of:
• (a)potential difference between them
• (b)mutual inductance between them
• (c)electric forces between them
• (d)magnetic force between them
1. A free charged particle moves through a magnetic field. The particle may undergo a change in:
• (a)speed  (b)energy   (c) direction of motion  (d) none these
1. An electron and a proton travel with equal speeds and in the same direction, at 90° to a uniform magnetic field. They experience forces which are initially:

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