Two long conductors, separated by a distance d carry current I_1 … - Vidyadip

MCQ

Two long conductors, separated by a distance $d$ carry current $I_1$ and $I_2$ in the same direction. They exert a force $F$ on each other. Now the current in one of them is increased to two times and its directions is reversed. The distance is also increased to $3d$. The new value of the force between them is

A
$-2F$
B
$F/3$
✓
$2F/3$
D
$-F/3$

✓

Answer

Correct option: C.

$2F/3$

c
(c) $F \propto \frac{{{i_1}{i_2}}}{a}$; Since one of the current increase two times and distance increases three times, so force become $\frac{2}{3}$times. Also due to the reversal of direction of current force becomes negative.

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

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The current in the following circuit is ........... $A$

A stone is dropped from a height $h.$ It hits the ground with a certain momentum $P.$ If the same stone is dropped from a height $100\%$ more than the previous height, the momentum when it hits the ground will change by ........... $\%$

The energy released by the fission of a single uranium nucleus is $200 \,MeV$. The number of fissions of uranium nucleus per second required to produce $16\, MW$ of power is

(Assume efficiency of the reactor is $50\%$)

In a grease spot photometer light from a lamp with dirty chimney is exactly balanced by a point source distance $10 \,cm $ from the grease spot. On clearing the chimney, the point source is moved $2 \,cm $ to obtain balance again. The percentage of light absorbed by dirty chimney is nearly......$\%$

A body is just floating on the surface of a liquid. The density of the body is same as that of the liquid. The body is slightly pushed down. What will happen to the body

A capillary tube when immersed vertically in liquid records a rise of $3\, cm$. If the tube is immersed in the liquid at an angle of ${60^0}$ with the vertical. The length of the liquid column along the tube is...... $cm$

In Thomson spectrograph experiment, four positive ions $P,Q,R$ and $S$ are situated on $Y-X$ curve a shown in the figure

A simple pendulum has time period $T$. The bob is given negative charge and surface below it is given positive charge. The new time period will be

The magnifying power of an astronomical telescope in the normal adjustment position is $100$. The distance between the objective and the eye piece is $101 \,cm$. Find the focal length of the objective lens.....$cm$

The radius of a circular current carrying coil is $R$. At what distance from the centre of the coil on its axis, the intensity of magnetic field will be $\frac{1}{2 \sqrt{2}}$ times that at the centre?