1. We have a hollow metallic sphere with charge -5.0 uC and radius 5.0 cm. We...

1.

We have a hollow metallic sphere with charge -5.0 uC and radius 5.0 cm. We insert a +10uC charge at the center of the sphere through a hole in the surface. What charge now rests on the outer surface of the sphere?

+5 uC

+10 uC

+15 uC

-5 uC
A free electron is in an electric field. With respect to the field, it experiences a force acting:

Parallel

Anti-parallel

Perpendicular

Along a constant potential line
A parallel plate capacitor has a capacitance of 20 uF. What charge on each plate will produce a potential difference of 36 V between the plates of the capacitor?

7.2 x 10^-4 C

3.6 x 10^-4 C

1.8 x 10^-4 C

0.9 x 10^-4 C
What is the intensity of sound from a band with a sound level of 120 dB? (I_o = 10^-12 W/m²)

1 W/m²

1.2 W/m²

10 W/m²

12 W/m²
Replacing a wire resistor with another of the same material and length but with three times the diameter will have the effect of changing the resistance by what factor?

0.33

1/9

3

9

Expert Solution

genius_generous answered 3 years ago

An initially uncharged hollow metallic sphere with radius of 5 cm has a small object with...

An initially uncharged hollow metallic sphere with radius of 5 cm has a small object with a charge of +10 mC carefully placed at the center of the sphere through a hole in the latter's surface. With the charge in place, what charge is now present on the outside surface of the sphere? I know the answer 10uC, but do not understand how to get there. Please show work.

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Metal sphere A of radius 11.0 cm carries 9.00 μC of charge, and metal sphere B...

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A hollow, conducting sphere with an outer radius of .250 m and an inner radius of...

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