# a particle of mass m, charge q and kinetic energy k enters a transverse uniform magnetic field b. after 10 seconds magnitude of momentum of the particle is

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## A particle of mass m, charge q and kinetic energy t enters a transverse uniform magnetic field of induction B. After 3 s, the kinetic energy of the particle will be

Click here👆to get an answer to your question ✍️ A particle of mass m, charge q and kinetic energy t enters a transverse uniform magnetic field of induction B. After 3 s, the kinetic energy of the particle will be

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## A particle of mass m, charge q and kinetic energy t enters a transverse uniform magnetic field of induction B. After 3 s, the kinetic energy of the particle will be

**A**

## 3T

**B**

## 2T

**C**

## T

**D**

## 4T

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Updated on : 2022-09-05

Solution Verified by Toppr

Correct option is C)

after passing through a magnetic field, the magnitude of its mass and velocity of the particle remains same, so its energy does not change that is kinetic energy will remain T.Hence (C) is correct answer

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## [Solved] A particle of mass m, charge Q and kinetic energy T ent

CONCEPT: Magnetic Field: The field around the magnet that exerts a magnetic force on the magnetic substances is called a magnetic field. When a cha

Home Physics Moving Charges and Magnetism Motion in a Magnetic Field Circulating Charged Particle

## Question

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A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of inductionB→

. After 3 seconds the kinetic energy of the particle will be -

T 4 T 3 T 2 T

## Answer (Detailed Solution Below)

Option 1 : T

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## Detailed Solution

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**CONCEPT**:

**Magnetic Field**: The field around the magnet that exerts a magnetic force on the magnetic substances is called a magnetic field.

When a charged particle enters a region of the uniform magnetic field,

it experiences a magnetic force which remains perpendicular to its motion due to which the particle undergoes a uniform circular motion.

As the magnetic force remain perpendicular to the motion, **work done by the magnetic force on the particle **= 0

Work done is given by the change in kinetic energy since work done is zero so is the kinetic energy.

**Change in kinetic energy of the particle is "0"**.

**Work done (W)**= Force (F).displacement (s) Cosθ

Where θ is the angle between F and s

**EXPLANATION**:

In the case of **magnetic force**,

The **force acting is perpendicular to the velocity** of the particle,

So θ = 90°

Work done (W) = F s cos90° = 0

The** kinetic energy **of the particle **will remain constant** i.e.** T.**

The** correct option is 1.**

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## A particle of mass m, charge q and kinetic energy T enters in a transverse uniform magnetic field of induction B. After the 3 s, the kinetic energy of the particle will be

A particle of mass m, charge q and kinetic energy T enters in a transverse uniform magnetic field of induction B. After the 3 s, the kinetic energy of the par

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A particle of mass m, charge q...

A particle of mass m, charge q and kinetic energy T enters in a transverse uniform magnetic field of induction B. After the 3 s, the kinetic energy of the particle will be

Updated On: 27-06-2022

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Guys, does anyone know the answer?