The wires in a household lamp cord are typically 2.5 mm apart center to center a

Question

The wires in a household lamp cord are typically 2.5 mm apart center to center and carry equal currents in opposite directions. Part A If the cord carries current to a 100-W light bulb connected across a 120-V potential difference, what force per meter does each wire of the cord exert on the other? (Model the amp cord as a very long straight wire.) Express your answer using two significant figures. F/L N/m Submit Request Answer Part B Is the force attractive or repulsive! attractive repulsive Submit Request Answer

Explanation / Answer

Current flow in wire

i= P/v= 100/120

i= 0.833 A

--------

Force acting per unit length

F= (uo/4pi)2* i^2/r

= 10^-7**2* 0.833^2/(2.5*10^-3)

= 5.56*10^-5 N/m

--------------

Force is repulsive in nature.

------------

No, force isn't large enough.

-----

Comment in case any doubt..goodluck

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.