Problem 15.35
หัวข้อ: แรงแม่เหล็กที่กระทำต่อกระแสไฟฟ้าที่ไหลผ่านตัวนำไฟฟ้า (Magnetic Force Acting on a Current-Carrying Conductor)
\(\vec{F}_{da}= 40.0 mN + 40.0 mN \;\blacksquare\)
ดูวิธีทำ
จาก \(\vec{F}_{ab}= I\vec{L}_{ab}\times \vec{B}\)
îĵk̂
\(\vec{F}_{ab}= (5.00)N\)
\(0-0.4000\)
\(00.02000\)
\(\vec{F}_{ab}= 0 N \;\blacksquare\)
จาก \(\vec{F}_{bc}= I\vec{L}_{bc}\times \vec{B}\)
îĵk̂
\(\vec{F}_{bc}= (5.00)N\)
\(000.400\)
\(00.02000\)
î
\(\vec{F}_{bc}= -40.0 mN \;\blacksquare\)
จาก \(\vec{F}_{cd}= I\vec{L}_{cd}\times \vec{B}\)
îĵk̂
\(\vec{F}_{cd}= (5.00)N\)
\(-0.4000.4000\)
\(00.02000\)
k̂
\(\vec{F}_{cd}= -40.0 mN \;\blacksquare\)
จาก \(\vec{F}_{da}= I\vec{L}_{da}\times \vec{B}\)
îĵk̂
\(\vec{F}_{da}= (5.00)N\)
\(0.4000-0.400\)
\(00.02000\)
îk̂
\(\vec{F}_{da}= 40.0 mN + 40.0 mN \;\blacksquare\)