AIEEE 2010 | Magnetics Question 265 | Physics

AIEEE 2010

MCQ (Single Correct Answer)

-1

Two long parallel wires are at a distance $$2d$$ apart. They carry steady equal currents flowing out of the plane of the paper as shown. The variation of the magnetic field $$B$$ along the line $$XX'$$ is given by

AIEEE 2010 Physics - Magnetics Question 259 English Option 1

AIEEE 2010 Physics - Magnetics Question 259 English Option 2

AIEEE 2010 Physics - Magnetics Question 259 English Option 3

AIEEE 2010 Physics - Magnetics Question 259 English Option 4

AIEEE 2009

MCQ (Single Correct Answer)

-1

A current loop $$ABCD$$ is held fixed on the plane of the paper as shown in the figure. The arcs $$BC$$ (radius $$= b$$) and $$DA$$ (radius $$=a$$) of the loop are joined by two straight wires $$AB$$ and $$CD$$. A steady current $$I$$ is flowing in the loop. Angle made by $$AB$$ and $$CD$$ at the origin $$O$$ is $${30^ \circ }.$$ Another straight thin wire steady current $${I_1}$$ flowing out of the plane of the paper is kept at the origin. AIEEE 2009 Physics - Magnetics Question 261 English

AIEEE 2009 Physics - Magnetics Question 261 English

The magnitude of the magnetic field $$(B)$$ due to the loop $$ABCD$$ at the origin $$(O)$$ is :

$${{{\mu _0}I\left( {b - a} \right)} \over {24ab}}$$

$${{{\mu _0}I} \over {4\pi }}\left[ {{{b - a} \over {ab}}} \right]$$

$${{{\mu _0}I} \over {4\pi }}\left[ {2\left( {b - a} \right) + {\raise0.5ex\hbox{$\scriptstyle \pi $} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 3$}}\left( {a + b} \right)} \right]$$

zero

AIEEE 2009

MCQ (Single Correct Answer)

-1

AIEEE 2009 Physics - Magnetics Question 260 English

Due to the presence of the current $${I_1}$$ at the origin:

The forces on $$AD$$ are $$BC$$ are zero.

The magnitude of the net force on the loop is given by $${{{I_1}I} \over {4\pi }}{\mu _0}\left[ {2\left( {b - a} \right) + {\raise0.5ex\hbox{$\scriptstyle \pi $} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 3$}}\left( {a + b} \right)} \right].$$

The magnitude of the net force on the loop is given by $${{{\mu _0}I{I_1}} \over {24ab}}\left( {b - a} \right).$$

The forces on $$AB$$ and $$DC$$ are zero.

AIEEE 2008

MCQ (Single Correct Answer)

-1

Relative permittivity and permeability of a material $${\varepsilon _r}$$ and $${\mu _r},$$ respectively. Which of the following values of these quantities are allowed for a diamagnetic material?

$${\varepsilon _r} = 0.5,\,\,{\mu _r} = 1.5$$

$${\varepsilon _r} = 1.5,\,\,{\mu _r} = 0.5$$

$${\varepsilon _r} = 0.5,\,\,{\mu _r} = 0.5$$

$${\varepsilon _r} = 1.5,\,\,{\mu _r} = 1.5$$

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