Electrical as well as gravitational effects can be thought to be caused by fields. Which of the following is true for an electrical or gravitational field?
- AGravitational or electric field does not exist in the space around an object.
- BFields are useful for understanding forces acting through a distance.
- CThere is no way to verify the existence of a force field since it is just a concept.
- DThe field concept is often used to describe contact forces.
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