Can electric force be repulsive and attractive?
Comparing Electrical and Gravitational Forces
Both equations show an inverse square relationship between force and separation distance. … Second, gravitational forces are only attractive; electrical forces can be either attractive or repulsive.
Which forces can be both attractive and repulsive?
Electric and magnetic (electromagnetic) forces can be attractive or repulsive, and their sizes depend on the magnitudes of the charges, currents, or magnetic strengths involved and on the distances between the interacting objects. Gravitational forces are always attractive.
Why can the electric force be attractive or repulsive where the gravitational force is always attractive?
What is the main difference between electrical and gravitational forces? Explanation: Electric forces can be attractive or repulsive because charges may be positive or negative. In the case for gravitational forces, there are only attractive forces because mass is always positive.
Are gravitational fields both attractive and repulsive?
Both in the Newton theory of gravitation and in the General Theory of Relativity the gravitational force is exclusively attractive one. However, the quantization of gravity shows that the gravitational forces can also be repulsive .
Is electromagnetic force attractive or repulsive?
Electromagnetic force is a special force that affects everything in the universe because it has an infinite-range attractive, like gravity; it is also a repulsive force which acts between charged particles.
How do you determine if a force is attractive or repulsive?
If both the interacting particles are positively or negatively charged, then the force is repulsive. If both the interacting particles are of opposite charges then the force is attractive in nature.
Is it true that the reaction of gravitational force is always gravitational?
Answer : Yes, it is true that the reaction of a gravitational force is always gravitational and that of an electromagnetic force is always electromagnetic and so on. … We know earth exerts gravitational force on Moon, as a reaction force the Moon exerts gravitational force on Earth.
Why is gravitational force repulsive?
It is shown that reduction of the gravitational mass of the system due to emitting gravitational waves leads to a repulsive gravitational force that diminishes with time but never disappears. This repulsive force may be related to the observed expansion of the Universe.
Why is gravity attractive force and not repulsive?
In the case of gravity, mediated by spin 2 particles, charge is mass, which is always positive. Thus, q1q2 is always greater than zero, and gravity is always attractive. For spin 0 force mediators, however, there is no restriction on the charges and you can very well have repulsive forces.
Why are gravitational forces always attractive?
Gravitational force is always attractive based on the traditional understanding of matter, which has a positive mass. As long as the mass of the objects is positive, the formula for calculating the magnitude of gravitational force is also positive, resulting in an attractive force.