Question

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answer in a way that i can understand easily.

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a straight wire carrying current vertically upward is placed in a uniform magnetic field directed northwards. the wire experience a force in which direction. explain.

Answer 1

according to Flemming's left hand rule
make all the 2-adjacent fingers after thumb of left hand in a order that they all make 90° with each other...and fold completely remaining 2 last fingers...

then your middle finger of will says about direction(dir.) of current.....

your thumb says about the dir. of force experienced......

and the remaining centered third finger says about the dir. of magnetic field .....

try to find it yourself.....
this is whole about Flemming's left hand rule.....