Embibe Experts Solutions for Chapter: Moving Charges and Magnetism, Exercise 1: Bihar Board-2019

An electron moving through a field remains un-deflected. It is possible that there is no magnetic field. Explain.

The resistance of ideal ammeter is-

The torque $\left(\overrightarrow{\tau }\right)$ experienced by a current loop of magnetic moment $\left(\overrightarrow{M}\right)$ placed in magnetic field $\overrightarrow{B}$ is-

What is shunt? Write its two uses.

In a vertically upward magnetic field $\overrightarrow{B}$, a positively charged particle is projected horizontally eastwards. What will be the direction of force on the particle?

Which of the expression is correct for Lorentz force?

The resistance of Ammeter is 

Write Fleming's Left hand rule ?