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Assertion: If an electron, while coming ...

Assertion: If an electron, while coming vertically from outerspace, enter the earth's magnetic field, it is deflected towards west.
Reason: Electron has negative charge.

A

If both assertion and reason are correct and reason is a 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.

Text Solution

Verified by Experts

The correct Answer is:
A
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Knowledge Check

  • Assertion (A) : If an electron, coming vertically from outer space, enters the earth's magnetic field, it is deflected towards west. Reason (R) : Electron has negative charge.

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

  • If an electron and a proton having same momenta enter perpendicular to a magnetic field, then

    A
    curved path of electron and proton will be same ( ignoring the sense of revolution)
    B
    they will move undeflected
    C
    curved path of electron is more curved than that of the proton
    D
    path of proton is more curved.

  • Assertion : A beam of protons is moving towards east in vertically upward magnetic field. Then, this beam will deflect towards south. Reason : A constant magnetic force will act on the proton beam.

    A
    If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
    B
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
    C
    If Assertion is true, but the Reason is false.
    D
    If Assertion is false but the Reason is true.

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    A positively charged particle falls vertically downwards. The horizontal component of earth's magnetic field will deflect it towards

    An electron moving towards the east enters a magnetic field directed towards the north. The force on the electron will be directed

    The electron in the beam of a television tube move horizontally from south to north. The vertical component of the earth's magnetic field points down. The electron is deflected towards.

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