Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

A wire of length $1m$ is placed in $x-z$ plane carries a current of $1A$. The coefficient of friction between the wire and the surface is $0.2$ and the mass of the wire is $2\; Kg$. The magnetic field of strength $2T$ exists along positive $y$ direction. Then which of the following is correct

$\begin {array} {1 1} (a)\;Acceleration\: of\: the \: wire \; is\: 2\: m/s^2 & \quad (b)\;Acceleration\: of\: the \: wire \; is\: 1\: m/s^2 \\ (c)\;Acceleration\: of\: the \: wire \; is\: 0.5\: m/s^2 & \quad (d)\;Acceleration\: of\: the \: wire \; is\: 0\: m/s^2 \end {array}$


Can you answer this question?

1 Answer

0 votes
Magnetic force= B i l
                        = 2x1x1
                        =2 N
Frictional force=  $\mu m g$
                        = 4 N
Magnetic force on the wire is smaller than the maximum value of frictional force.
Ans : (d)


answered Feb 19, 2014 by thanvigandhi_1
edited Sep 19, 2014 by thagee.vedartham

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App