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Physics-

General

Easy

Question

A current I flows a closed path in the horizontal plane of the circle as shown in the figure. The path consists of eight cars with alternating radii r and 2r. Each segment of arc subtends equal angle at the common centre P. The magnetic field produced by current path at point P is

$\frac{3}{8} \frac{μ_{0} I}{r}$ perpendicular to the plane of the paper and directed inward
$\frac{1}{8} \frac{μ_{0} I}{r}$ perpendicular to the plane of the paper and directed outward
$\frac{1}{8} \frac{μ_{0} I}{r}$ perpendicular to the plane of the paper and directed inward
$\frac{3}{8} \frac{μ_{0} I}{r}$ perpendicular to the plane of the paper and directed outward

The correct answer is: $fraction numerator 3 over denominator 8 end fraction fraction numerator mu subscript 0 end subscript I over denominator r end fraction$ perpendicular to the plane of the paper and directed inward

$stack B with rightwards arrow on top equals open square brackets fraction numerator mu subscript 0 end subscript over denominator 4 pi end fraction fraction numerator l over denominator 2 r end fraction pi plus fraction numerator mu subscript 0 end subscript over denominator 4 pi end fraction fraction numerator I over denominator r end fraction pi close square brackets circled times equals fraction numerator 3 mu subscript 0 end subscript I over denominator 8 r end fraction circled times$

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The square loop ABCD, carrying a current I, is placed in a uniform magnetic field B, as shown. The loop can rotate about the axis XX. The plane of the loop makes an angle $theta open parentheses theta less than 90 to the power of ring operator end exponent close parentheses$ with the direction of B. Through what angle will the loop rotate by itself before the torque on it becomes zero–

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In the given figure, $A C perpendicular C E$ and $angle A colon angle B colon angle C equals 3 colon 2 colon 1$ , then the value of $angle E C D$ is

Hence Choice 3 is correct

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Hence Choice 3 is correct

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Compute the value of x in the given figure.

Compute the value of x in the given figure.

Compute the value of x in the given figure.

The value of x=88^o

Compute the value of x in the given figure.

The value of x=88^o

Compute the value of x in the given figure.

Hence option B is correct

Compute the value of x in the given figure.

Hence option B is correct

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Compute the value of x in the given figure.

Choice 4 is correct

Compute the value of x in the given figure.

Choice 4 is correct

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Hence 85^o is correct option

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Hence 85^o is correct option

In figure, if $A B parallel to C D comma C D parallel to E F$ and y : z = 3 : 7, x = ?

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In figure, if $A B parallel to C D comma C D parallel to E F$ and y : z = 3 : 7, x = ?

Hence x=126 choice 4 is correct

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