Electrons moving with different speeds enter a uniform magnetic field in a direction perpendicular to the field. They will move along circular paths.
A
of same radius
B
with larger radii for the faster electrons
C
with smaller radii for the faster electrons
Deither $(b)$ or $(c)$ depending on the magnitude of the magnetic field
Medium
Download our app for free and get started
B
with larger radii for the faster electrons
b $r=\frac{m v}{q B} \Rightarrow r \propto v$
Download our app
and get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
An electron is moving along the positive $X$$-$axis. You want to apply a magnetic field for a short time so that the electron may reverse its direction and move parallel to the negative $X$$-$axis. This can be done by applying the magnetic field along
An electron is moving along $+x$ direction with a velocity of $6 \times 10^{6}\, ms ^{-1}$. It enters a region of uniform electric field of $300 \,V / cm$ pointing along $+ y$ direction. The magnitude and direction of the magnetic field set up in this region such that the electron keeps moving along the $x$ direction will be
A circular coil ‘$A$’ has a radius $R$ and the current flowing through it is $I$. Another circular coil ‘$B$’ has a radius $2R$ and if $2I$ is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of (i.e.${B_A}$ to ${B_B}$)
A voltmeter of resistance $1000\,\Omega $ gives full scale deflection when a current of $100\, mA$ flow through it. The shunt resistance required across it to enable it to be used as an ammeter reading $1\, A$ at full scale deflection is ............... $\Omega $
In order to pass $10\,\%$ of main current through a moving coil galvanometer of $99\, ohm$, the resistance of the required shunt is ............ $\Omega $