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According to Coulomb's law force between...

According to Coulomb's law force between two charges `q_(1)` and `q_(2)` at 'r' distance apart....

A

`F prop (q_(1)q_(2))/(r)`

B

`F prop (q_(1)q_(2))/(r^(2))`

C

`F prop ((q_(1)q_(2))/(r))^(2)`

D

`F prop (q_(1)+q_(2))/(r^(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
`F prop (q_(1)q_(2))/(r^(2))`
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The Bohr model for the H-atom relies on the Coulomb's law of electrostatics. Coulomb's law has not directly been verified for very short distances of the order of angstroms. Supposing Coulomb's law between two opposite charge +q_(1),-q_(2) is modified to |F|=(q_(2)q_(1))/((4pi epsi_(0)))(1)/(r^(2)),r ge R_(0) =(q_(1)q_(2))/(4pi epsi_(0))(1)/(R_(0)^(2))((R_(0))/(r))^(e),r lt R_(0) Calculate in such a case, the ground state energy of a H-atom if epsi=0.1 R_(0)=1Å

Write general equation of Coulombian force on q_1 by system of charges q_(1),q_(2) and q_(3)

Knowledge Check

  • Coulombian force between two charges ………….

    A
    is always attractive.
    B
    is always repulsive.
    C
    may be attractive or repulsive.
    D
    is always zero.

  • A: Electric force is the reason for electron to remain in a atom. R : According to Coulomb's law, the electron in a atom can remain stable in nucleus only if the centripetal force is equal to its centrifugal force.

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

  • If Coulomb's law is represented by F=kq_(1)q_(2) r^(n) , then n = ......

    A
    `1/2`
    B
    `-1/2`
    C
    2
    D
    `-2`

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    The electric force between two electric charges is given by F=k(q_(1)q_(2))/(r^(2)) where r is the distance between q_(1) and q_(2) . Give the dimensional formula of k.

    The electric force between two electric charges is given by F= (1)/(4pi epsi_(0))(q_(1)q_(2))/(r^(2)) . where is a distance . between charges q_(1) and q_(2) . So, unit and dimensional formula of epsi_(0) , is ...... and...... respectively.

    How did Coulomb find the law of value of electric force between two point charges ?

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