A parallel-plate capacitor filled with air carries a charge Q. The battery is disconnected, and a slab of material with dielectric constant K = 2 is inserted between the plates. Which of the following statements is true?
1.The voltage across the capacitor decreases by a factor of 2.
2.The voltage across the capacitor is doubled.
3.The charge on the plates is doubled.
4.The charge on the plates decreases by a factor of 2.
5.The electric field is doubled.
3
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Which of these features is attributed to the shrinking of Mercury's core?
A) rilles B) scarps C) craters D) mare E) rays
In the grapefruit model of the solar system, it would take a few minutes to walk from the Sun to Pluto
Indicate whether the statement is true or false
Image height divided by object height gives
a. image distance. b. object distance. c. magnification. d. real image size. e. virtual image size.
You intend to move a rectangular loop of wire into a region of uniform magnetic field at a given speed so as to induce an emf in the loop. The plane of the loop must remain perpendicular to the magnetic field lines. In which orientation should you hold the loop while you move it into the region with the magnetic field to generate the largest emf?
1.with the long dimension of the loop parallel to the velocity vector 2.with the short dimension of the loop parallel to the velocity vector 3.Either way because the emf is the same regardless of orientation.