Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A 1 m long metal rod XY completes the circuit as shown in figure. The plane of the circuit is perpendicular to the magnetic field of flux density 0.15 T. If the resistance of the circuit is <i

A 1 m long metal rod XY completes the circuit as shown in figure. The plane of the circuit is perpendicular to the magnetic field of flux density 0.15 T. If the resistance of the circuit is 5\Omega,the force needed to move the rod in direction, as indicated, with a constant speed of 4 m/s will be _______ 10^{-3} \mathrm{~N}
                                                  

Option: 1

18


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

\begin{aligned} & \mathrm{F}=\mathrm{I} \ell \mathrm{B}=\left(\frac{\mathrm{e}}{\mathrm{R}}\right) \ell \mathrm{B}=\frac{(\mathrm{B} \ell) \mathrm{B} \ell}{\mathrm{R}}=\frac{\mathrm{B}^2 \ell^2 v}{\mathrm{R}} \\ & =\frac{(\cdot 15)^2 \times(1)^2 \times 4}{5}=180 \times 10^{-4} \\ & =18 \times 10^{-3}=18 \text { Ans. } \end{aligned}

Posted by

mansi

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025: 11 from Kota coaching centres among 24 students with 100 percentile
anam-khan

Low JEE Main rank? Explore alternative paths for engineering admission
anam-khan

Gender-gap in JEE Main 2025: Female participation remains around 31%, overall pool drops by 7.09%

Latest Question