A long wire is placed parallel to a loop in a same plane as given… - Vidyadip

MCQ

A long wire is placed parallel to a loop in a same plane as given in figure. Find magnetic flux through loop, if area under the curve of graph between magnetic field $B$ and distance $r$ from $r_1$ and $r_2$ is $A$ . Here $B$ is magnetic field due to current (constant) in wire

✓
$Al$
B
$\frac {Al}{2}$
C
$\sqrt 3\ Al$
D
Information is not sufficient for answer the questions

✓

Answer

Correct option: A.

$Al$

a
$B=\frac{\mu i}{2 \pi r}$

$A=\int B d r=\frac{\mu_{0} L^{\circ}}{2 \pi} l n\left(\frac{r_{2}}{r_{1}}\right)$

${\text{d}}\phi = \int {\text{B}} \,{\text{ldr}} = \int {\frac{{{\mu _{\text{o}}}{\text{i}}}}{{2\pi r}}} l{\text{dr}} = {\text{A}}l$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 6. Electromagnetic induction→6. Electromagnetic induction — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

A particle of charge q and mass m is moving along the x -axis with a velocity v and enters a region of electric field E and magnetic field B as shown in figure below for which figure the net force on the charge may be zero

Consider three converging lenses $L_1, L_2$ and $L_3$ having identical geometrical construction. The index of refraction of $L_1$ and $L_2$ are $\mu_1$ and $\mu_2$ respectively. The upper half of the lens $L_3$ has a refractive index $\mu_1$ and the lower half has $\mu_2$. A point object $O$ is imaged at $O_1$ by the lens $L_1$ and at $O_2$ by the lens $L_2$ placed in same position. If $L_3$ is placed at the same place:

A man can see the object between $15\, cm$ and $30\, cm$. He uses the lens to see the far objects. Then due to the lens used, the near point will be at........$cm$

In the given circuit, calculate the value of current in $4.5\,\Omega $ resistor .............. $\mathrm{A}$

A thin metal plate P is inserted half way between the plates of a parallel plate capacitor of capacitance C in such a way that it is parallel to the two plates. The capacitance now becomes

Assertion : Isobars are the element having same mass number but different atomic number.
Reason : Neutrons and protons are present inside nucleus.

The de-Broglie wavelength of electron in $3^{\text {rd }}$ orbit of $\mathrm{He}^{+1}$ ion is approximately.

A conducting wire is moving towards right in a magnetic field $B$. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be

The reading of voltmeter in the circuit shown is ............. $V$

A uniform wire of 16 Ω is made into the form of a square. Two opposite corners of the square are connected by a wire of resistance 16 Ω. The effective resistance between the other two opposite corners is