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Grade 12Magnetism

SIR PLEASE TELL ME THE CONCEPT OF ABOVE QUESTION IN THE IMAGE

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HARSHIT

7 Years agoGrade 12

1 Answer

Susmita

7 Years ago

When any charged particle q₁ is placed in potential V,its potential energy is q₁V.Just like when we apply a voltage difference across a conducting wire in a circuit,the electrons starts to flow,ie,the electrons acquire some velocity or kinetic energy.

Who supplies this kinetic energy?The potential difference,or the potential energy.

So q₁V=(1/2)mv²

or,v=root(2q₁V/m)

Now it enters a magnetic field B perpendicularly.So force experienced is

$F=q_{1}|\vec{v}*\vec{B}|=q_{1}vB=q_{1}B\sqrt{\frac{2q_{1}V}{m}}$

Later it is accelerated through a potential 5V.

So its velocity will increase to

v=root(2q₁.5V/m)

Now the force

$F`=q_{1}B\sqrt{\frac{2q_{1}*5V}{m}}=\sqrt{5}F$

If it helps please approve.

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