Flag Magnetism> Circular loop of a wire and a long straig...
question mark

Circular loop of a wire and a long straight wire carry currents lc and
le, respectively as shown in figure. Assuming that these are placed in
the same plane. The magnetic fields will be zero at the centre of the
loop when the separation H is-

Mayank Kumar , 10 Years ago
Grade 12
anser 1 Answers
ROSHAN MUJEEB

Last Activity: 4 Years ago

Using Ampere's circuital law. Mag. field at centre of circular coil due to long straight wire
B1=μ0Il2πHB1=μ0Il2πH
Due to circular coil, mag. field at the centre O is given byB2=μ0Ic2RB2=μ0Ic2R
NowB1B1andB2B2are is opposite directions. For resultant to be zero,B1=B2B1=B2
μ0Il2πH=μ0Ic2Rμ0Il2πH=μ0Ic2R, i.e.,H=IlRIcπ

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments