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The momentum of a system is conserved...

The momentum of a system is conserved

A

always

B

never

C

in the absence of an external force on the system

D

in linear motions only

Text Solution

Verified by Experts

The correct Answer is:
C
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What is the minimum energy that must be given to a H atom is ground state so that it can emit an H gamma line in Balmer series. If the angular momentum of the system is conserved, what would be the angular momentum of such H gamma photon ?

Is angular momentum of a system always conserved ?

Knowledge Check

  • Statement-1 : Total linear momentum of system in centre of mass frame is zero only when there is no net external force. Statement-2 : Total linear momentum of system is conserved in absence of net external force.

    A
    Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
    B
    Statement -1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
    C
    Statement-1 is true, statement-2 is false.
    D
    Statement-1 is false, statement-2 is true.

  • Assertion: A boy is rotating in a rotating chair with some angular speed. Initially arma of the boy are stretched out. When boy folds his hands then angular speed increases Reason: Angular momentum of the system is conserved in absence of external torque.

    A
    If both assertion and reason are correct and reason is the correct explanation of the assertion.
    B
    If both assertion and reason are correct but reason is not the correct explanation of assertion
    C
    If assertion is correct but reason is incorrect.
    D
    If assertion is incorrect but reason is correct

  • In the question number 79, what would be the angular momentum of H_gamma photon if the angular momentum of the system is conserved

    A
    ħ
    B
    2ħ
    C
    3ħ
    D
    4ħ

    • Similar Questions

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    A bomb, initially at rest, explodes into several pieces. (a) Is linear momentum of the system conserved? (b) Is kinetic energy of the system conserved? Explain.

    These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five responses. Reason: In an eleastic collision, the linear momentum of the system is conserved.

    STATEMENT-l : In an elastic collision between two bodies, the relative speed of the bodies after collision is equal to the relative speed before the collision. STATEMENT-2 : In an elastic collision, the linear momentum of the system is conserved.

    Statement I: In an elastic collision between two bodies, the relative speed of the bodies after collision is equal to the relative speed before the collision. Statement II: In an elastic collision, the linear momentum of the system is conserved.

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