If cathode rays are projected at right angles to a magnetic field, their trajectory is
Easy
Download our app for free and get started
Let the magnetic field be along North direction. Let cathode ray pass perpendicular to the magnetic field towards east.then it gets deflected downwards.
Fleming's left hand rule is meant for the movement of positively charged particles.
But cathode rays are stream of negatively charged electrons. So opposite to the previous one. And like postive charge it will make a circular trajectory.
Download our appand 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.*
Similar Questions
- 1Two infinitely long parallel wires carry currents of magnitude $I_1$ and $I_2$ are at a distance $4 cm$ apart. The magnitude of the net magnetic field is found to reach a non-zero minimum value between the two wires and $1 \,cm$ away from the first wire. The ratio of the two currents and their mutual direction isView Solution
- 2View SolutionThe magnetic dipole pm is placed parallel to an infinitely long straight wire as shown in figure
- 3View SolutionA positively charged particle enters in a region of uniform. Transverse magnetic field as shown in figure find net deviation in path of the particle.
- 4Consider the inferences given below in respect of the following current loop of wire kept is a magnetic field $\vec B$View Solution
$A.$ The force on the element $AC$ of the wire is $\frac{{\sqrt 3 }}{2}\,ILB$ directed into the page
$B.$ The force on the element $AB$ of the wire is $\frac{{\sqrt 3 }}{2}\,ILB$ directed into the page
$C.$ The total force on the loop $ABCA$ is zero.
Which of the above is /are not true ?
- 5View SolutionTwo free parallel wires carrying currents in opposite direction
- 6The electric current in a circular coil of four turns produces a magnetic induction $32\,T$ at its centre. The coil is unwound and is rewound into a circular coil of single turn, the magnetic induction at the centre of the coil by the same current will be $..........\,T$View Solution
- 7If two protons are moving with speed $v=4.5 \times 10^{5} \,m / s$ parallel to each other then the ratio of electrostatic and magnetic force between themView Solution
- 8The magnetic field existing in a region is given by $\vec B\, = \,{B_0}\,\left( {5 + \frac{x}{l}} \right)\,\hat K$ A square loop of edge $l$ and carrying a current $i$ is placed with its edges parallel to $x-y$ axes. Find the magnitude of the net magnetic force experienced by the loopView Solution
- 9A proton, a deuteron and an $\alpha-$particle with same kinetic energy enter into a uniform magnetic field at right angle to magnetic field. The ratio of the radii of their respective circular paths isView Solution
- 10A long solenoid is producing magnetic field on its axis is $B$. If it is cuts into four equal parts and for same current, half number of turns wound on any on piece than value of magnetic field on it axis becomesView Solution