ELECTROMAGNETIC FORCE

Assertion (A) Electromagnetic force is enormously strong as compared to gravitational force. Yet gravity dominates in the large-scale phenomena (e.g. formation of galaxies). Reason ( R ) Existence os positive and negative charges make matter mostly electrically neutral. Which of the following is true ?

Let E,G and N represent the magnitudes of electromagnetic, gravitational and nuclear forces between two electrons at a given separation. Then

Let E,G and N represent the magnitudes of electromagnetic, gravitational and nuclear forces between two electrons at a given separation. Then

(A) : When you shake hands with your friend the force involved is electromagnetic in nature. (R ) : Frictional force is electromagnetic in nature

(A) : When you shake hands with your friend the force involved is electromagnetic in nature. (R ) : Frictional force is electromagnetic in nature

A: Gravitational force is always attractive but electromagnetic force can be attractive or repulsive: R : Mass comes only in one variety (there is no negative mass) but charge comes in two varieties. (Positive and negative charge)

A: Gravitational force is always attractive but electromagnetic force can be attractive or repulsive: R : Mass comes only in one variety (there is no negative mass) but charge comes in two varieties. (Positive and negative charge)