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JEE Advanced 2009Paper 2

Exam: JEE Advanced
Year: 2009
Paper: Paper 2
Subject: Physics
Chapter: Magnetic Effects of Current

JEE Advanced 2009 · Paper 2 · Physics · Magnetic Effects of Current

A steady current I goes through a wire loop P Q R having shape of a...

A steady current

I

goes through a wire loop

P Q R

having shape of a right angle triangle with

P Q=3 x, P R=4 x

and

Q R=5 x

. If the magnitude of the magnetic field at

P

due to this loop is

k\left(\frac{\mu_0 I}{48 \pi x}\right)

, find the value of

k

.

A steady current I goes through a wire loop P Q R having shape of a right angle triangle with P Q=3 x, P R=4 x and Q

A steady current I goes through a wire loop P Q R having shape of a right angle triangle with P Q=3 x, P R=4 x and Q

Correct answer

0

Step-by-step solution

Magnetic field at point

P

due to wires

R P and R Q

is zero. Only wire

Q R

will produce magnetic field at

P

. r=3 x \cos 37^{{}^{\circ}}=(3 x)

\left(\frac{4}{5}\right)=\frac{12 x}{5}

A steady current I goes through a wire loop P Q R having shape of a right angle triangle with P Q=3 x, P R=4 x and Q

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