# GATE Questions & Answers of Lorentz force

## What is the Weightage of Lorentz force in GATE Exam?

Total 2 Questions have been asked from Lorentz force topic of Electromagnetic Fields subject in previous GATE papers. Average marks 1.50.

A rotating conductor of 1 m length is placed in a radially outward (about the z-axis) magnetic flux density (B) of 1 Tesla as shown in figure below. Conductor is parallel to and at 1 m distance from the z-axis. The speed of the conductor in r.p.m. required to induce a voltage of 1 V across it, should be __________.

A circular turn of radius 1 m revolves at 60 rpm about its diameter aligned with the x-axis as shown in the figure. The value of μ0 is $4\mathrm{\pi }×{10}^{-7}$ in SI unit. If a uniform magnetic field intensity $\stackrel{\to }{H}={10}^{7}\stackrel{^}{z}$ A/m is applied, then the peak value of the induced voltage,${V}_{turn}$ (in volts), is __________.