Question

A U-shaped wire of mass m and length is immersed with its two ends in mercury. The wire is
a homogeneous field of magnitude B. If a charge, passes through wire for small interval at The
wire will jump up to the height 'h' find the amount of charge passes from wire.​

Answer 1

Explanation:

m  

2gh

​

 

​

 

F=i(  

L

X  

B

)

F=ilBsinθ

F=ilBsin90  

∘

 

F=ilB

2

1

​

mv  

2

=ugh

v=  

2gh

​

 

∫Fdt=mv

lB∫idt=mv

lBq=m  

2gh

​

 

q=  

lB

m  

2gh

​

 

​