A particle of mass $m,$ charge $Q$ and kinetic energy $K$ enters a transverse uniform magnetic field of induction $B.$ After $3$ $seconds$ the kinetic energy of the particle will be .......$K$
AIPMT 2008, Easy
Download our app for free and get started
When a charged particle having a given $K.E.$, Tenters in a field of magnetic induction, which is perpendicular to its velocity, it takes a circular trajectory. It does not increase in energy, therefore
$K$ is the $K.E.$
$K$ is the $K.E.$
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
- 1A loop is moulded by a constant length current carrying wire and placed in external magnetic field, then torque acts on it does not depends uponView Solution
$(a)$ Shape of loop
$(b)$ Area of loop.
$(c)$ Current in loop
$(d)$ External magnetic field.
- 2View SolutionAn electron is travelling horizontally towards east. A magnetic field in vertically downward direction exerts a force on the electron along
- 3Find the magnetic field at the point $P$ in figure. The curved portion is a semicircle connected to two long straight wires.View Solution
- 4A conductor of length $l$ and mass $m$ is placed along the east-west line on a table. Suddenly a certain amount of charge is passed through it and it is found to jump to a height $h$. The earth’s magnetic induction is $B$. The charge passed through the conductor is:View Solution
- 5Current $i$ is passed as shown in diagram. If radius of the circle is a, then the magnetic flux density at the centre $P$ will be:View Solution
- 6An arrangement with a pair of quarter circular coils of radii $r$ and $R$ with a common centre $C$ and carrying a current $I$ is shown in the figure. The permeability of free space is $\mu_0$. The magnetic field at $C$ isView Solution
- 7View SolutionTwo infinitely long parallel wires carry equal current in same direction. The magnetic field at a mid point in between the two wires is
- 8Three long, straight and parallel wires carrying currents are arranged as shown in the figure. The wire $C$ which carries a current of $5.0\, amp$ is so placed that it experiences no force. The distance of wire $C$ from wire $D$ is thenView Solution
- 9A galvanometer having a coil resistance of $30\,\Omega $ shows full scale deflection when a current of $2\,A$ passes through it. It can be converted into an ammeter to read currents upto $10\,A$ byView Solution
- 10Two protons move parallel to each other, keeping distance $r$ between them, both moving with same velocity $\vec V\,$. Then the ratio of the electric and magnetic force of interaction between them isView Solution