Question

Let E,G and N represent the magnitudes of electromagnetic, gravitational and nuclear forces between the two electrons at a given separation. Then
(a) N>E>G
(b) E>N>G
(c) G>N>E
(d) E>G>N.

Concept of Physics - 1 , HC VERMA , Chapter "The Force"

Answer 1

Hello Dear.

Answer :- Option D.   E > G > N.

Explanation ⇒ 

Nuclear Forces are very weak force and are closely ranged. There effects are only in the nucleus otherwise they are negligible. In the given case electrons are kept at the separation but there is no involvement of the nucleus.Thus, its magnitude will be very less.

For the Gravitational Force, it depends upon the mass of the body. Thus, as the Mass increases the Gravitational Force also increases and Vice versa. We know the mass of the Electrons is 9.1 × 10⁻³¹ kg, which is very less, thus the gravitational force between the electrons at the given separation will also be less but it magnitude will be more than the Nuclear force.

For the Electromagnetic Force, Charged particles are necessary. Electrons are the charged particles whose charge is exactly equals to the charge on the protons but mass of the Electrons is much less. Hence, the Magnitude of the Electromagnetic force is largest than the other two.


Thus, the Sequence of the Magnitude in descending order of the Forces is ⇒
E > G > N.


Hope it helps. :-)

Answer 2

Let E,G and N represent the magnitudes of electromagnetic, gravitational and nuclear forces between the two electrons at a given separation. Then most strong acting force is really the electromagnetic force, between 2 electrons at such a specified separation

Explanation:

Option (d) E > G > N is right .

• The most strong acting force is really the electromagnetic force, between 2 electrons at such a specified separation.

• Gravitational force is also the most weak force among any 2 particles. Between them there seems to be no nuclear energy, since it occurs only in the nucleus ( for both neutron-neutron or proton-proton or both). Therefore, the option (d) E > G > N is correct.

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