Question

Find the total momentum of electrons in a straight wire of length 1000m carrying a current i = 70a

Answer 1

Answer:

The total momentum will be 3.981×10^(−7) kg−m/s

Explanation:

Let the momentum as O, Length of the wire = l=1000m , the current ,i= 70 a

therefore to find the total momentum the formula is to multiply current mass and length and divide the result with the charge of an electron

O =iml/e [ where m= mass of the electron , e = electron charges]

O =70×9.1×10^(−31) ×10^3/1.6×10^(−19)

or, O=3.981×10^(−7) kg−m/s