Acrane lift a cargo 10 m off the ground. if the the crane lifts the cargo box twice as high the potential energy will increase by

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.