Download App

Moving Charges and Magnetism — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMoving Charges and Magnetism1 Mark
MCQ
Same current is flowing through two parallel conducting wires at a distance $d$ in opposite directions. The intensity of magnetic field at the midpoint between the wires is :
  • A
    $\frac{\mu_{ o } i}{2 \pi d}$
  • ✓
    $\frac{2 \mu_0 i}{\pi d}$
  • C
    $\frac{\mu_0 i}{\pi d^2}$
  • D
    zero
✓

Answer

Correct option: B.
$\frac{2 \mu_0 i}{\pi d}$
(b)$\frac{2 \mu_0 i}{\pi d}$

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 Moving Charges and Magnetism→Moving Charges and Magnetism — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

As shown in figure, on bringing a charge $Q$ from point $A$ to $B$ and from $B$ to $C$, the work done are $2\, joule$ and $-3\, joule$ respectively. The work done to bring the charge from $C$ to $A$ is
→
A conducting circular loop is placed in $X - Y$ plane in presence of magnetic field $\overrightarrow{ B }=\left(3 t ^{3} \hat{ j }+3 t ^{2} \hat{ k }\right)$ in SI unit. If the radius of the loop is $1 m$, the induced emf in the loop, at time, $t =2\,s$ is $n \pi V$. The value of $n$ is.
→
The magnetic potential at a point on the axial line of a bar magnet of dipole moment $M$ is $V$. What is the magnetic potential due to a bar magnet of dipole moment $\frac{M}{4}$ at the same point
→
In the hydrogen spectrum, the ratio of the wavelengths for Lyman-alpha radiation to Balmer-alpha radiation is
→
The current through an inductor is given by $i = (10 + 20t) \,amp.$ where $t$ is in $sec.$ The induced $emf$ in the inductor is $4\, V.$ The total flux linked with the inductor at $t = 2s$ is ......$Wb$
→
The main cause of Zener breakdown is:
→
A coil is placed in a magnetic field $\overrightarrow{{B}}$ as shown below:

A current is induced in the coil because $\overrightarrow{{B}}$ is:

→
Phase difference between voltage across the ends of an inductor coil and capacitor in radians is:
→
A wire cd of length l and mass m is sliding without friction on conducting rails ax and by as shown. The vertical rails are connected to each other with a resistance R between a and b. A uniform magnetic field B is applied perpendicular to the plane abcd such that cd moves with a constant velocity of
→
In the circuit shown, the resistance $r$ is a variable resistance. If for $r = fR,$  the heat generation in $r$ is maximum then the value of $f$ is 
→