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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): In uniform magnetic field, speed and energy remains the same for a moving charged particle.
Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.
  • a)
    Both (A) and (R) are true and (R) is the correct explanation of (A).
  • b)
    Both (A) and (R) are true but (R) is not the correct explanation of (A).
  • c)
    (A) is true but (R) is false.
  • d)
    (A) is false but (R) is true.
Correct answer is option 'A'. Can you explain this answer?
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Given below are two statements: one is labelled as Assertion (A) and t...
Assertion (A): In uniform magnetic field, speed and energy remains the same for a moving charged particle.
Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.

The correct answer is option A: Both (A) and (R) are true and (R) is the correct explanation of (A).

Explanation:

1. Magnetic Field and Charged Particle:
When a charged particle moves through a magnetic field, it experiences a magnetic force. This force is given by the equation F = qvBsinθ, where F is the magnetic force, q is the charge of the particle, v is its velocity, B is the magnetic field, and θ is the angle between the velocity vector and the magnetic field vector.

2. Magnetic Force and Motion:
The magnetic force acting on a charged particle is always perpendicular to its velocity vector. This means that the magnetic force does not do work on the particle, as work is defined as the product of force and displacement in the direction of the force. Since the magnetic force is always perpendicular to the velocity vector, it does not change the speed or kinetic energy of the particle.

3. Uniform Magnetic Field:
In a uniform magnetic field, the magnetic field strength (B) and direction remain constant throughout the region. This means that the magnetic force experienced by a charged particle moving through a uniform magnetic field will also remain constant in magnitude and direction.

4. Speed and Energy:
Since the magnetic force does not change the speed or kinetic energy of a charged particle, the speed and energy of the particle will remain the same as it moves through a uniform magnetic field.

5. Explanation of Reason (R):
The reason provided (R) correctly explains why the speed and energy of a moving charged particle remain the same in a uniform magnetic field. The magnetic force experienced by the particle is always perpendicular to its direction of motion, and thus does not do work on the particle.

6. Conclusion:
In conclusion, both the assertion (A) and the reason (R) are true. The reason correctly explains why the assertion is true. In a uniform magnetic field, the speed and energy of a moving charged particle remain the same because the magnetic force acting on the particle is always perpendicular to its direction of motion.
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Given below are two statements: one is labelled as Assertion (A) and t...
Magnetic force 
⇒ Wb = 0
⇒ ΔKE = 0 and speed remains constant.
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)Assertion (A): In uniform magnetic field, speed and energy remains the same for a moving charged particle.Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.a)Both (A) and (R) are true and (R) is the correct explanation of (A).b)Both (A) and (R) are true but (R) is not the correct explanation of (A).c)(A) is true but (R) is false.d)(A) is false but (R) is true.Correct answer is option 'A'. Can you explain this answer?
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)Assertion (A): In uniform magnetic field, speed and energy remains the same for a moving charged particle.Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.a)Both (A) and (R) are true and (R) is the correct explanation of (A).b)Both (A) and (R) are true but (R) is not the correct explanation of (A).c)(A) is true but (R) is false.d)(A) is false but (R) is true.Correct answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)Assertion (A): In uniform magnetic field, speed and energy remains the same for a moving charged particle.Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.a)Both (A) and (R) are true and (R) is the correct explanation of (A).b)Both (A) and (R) are true but (R) is not the correct explanation of (A).c)(A) is true but (R) is false.d)(A) is false but (R) is true.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)Assertion (A): In uniform magnetic field, speed and energy remains the same for a moving charged particle.Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.a)Both (A) and (R) are true and (R) is the correct explanation of (A).b)Both (A) and (R) are true but (R) is not the correct explanation of (A).c)(A) is true but (R) is false.d)(A) is false but (R) is true.Correct answer is option 'A'. Can you explain this answer?.
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