A satellite is revolving around the earth in a circular orbit with a uniform speed v. If the gravitational force suddenly disappears, the satellite will:

(A) Continue to move in the same orbit with speed v
(B) move tangentially to the orbit with speed v
(C) Move away from the earth normally to the orbit
(D) Fall down on the earth

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    (A) an electric field only
    (B) a magnetic field only
    (C) both electric and magnetic fields
    (D) neither electric or a magnetic field

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