# Physics

posted by .

1.A spherical condenser has inner and outer spheres of radii a and b respectively. The space between the two is filled air. The difference between the capacities of the two condensers formed when outer sphere is earthed and when inner sphere is earthed will be.........? Explain.
2. Charged pendulums are in equilibrium, making angle A, this arrangement is taken to rotating satellite, what will be the new value of A?

• Physics -

There is no difference. THe capacitance is determined by the voltage difference between the spheres, and the two radii.
http://www.mwit.ac.th/~physicslab/hbase/electric/capsph.html

On earth, the charges repel, and the forces pulling the pendulum down is gravity. I orbit, gravity is equalled by centripetal force, giving the effect of no gravity, so the pendulums will be at 180 degrees.

• Physics -

Thanks

## Similar Questions

1. ### physics

The gravitatioinal force between two metal sphere in outer space is 2000 N. How large would the force be if the two spheres were four times farter apart?
2. ### Physics Conducting Spheres

1. Two concentric conducting spherical shells have radii of 0.145 m. and 0.215 m. The inner sphere bears a charge of -3.00E-08 C. An electron escapes from the inner sphere with negligible speed. Assuming that the region between the …
3. ### Physics

There are two conducting concentric hollow spheres of outer radii R2 and R1 (R2>R1). The thickness of the material of both spheres is d. The inner sphere is negatively charged with charge density −σ1. The larger sphere …
4. ### Physics

There are two conducting concentric hollow spheres of outer radii and ( ). The thickness of the material of both spheres is . The inner sphere is negatively charged with charge density . The larger sphere is positively charged with …
5. ### physics

A capacitor consists of two concentric spherical shells. The outer radius of the inner shell is a=0.76 mm and the inner radius of the outer shell is b=3.31 mm . (a) What is the capacitance C of this capacitor?
6. ### Physics

A capacitor consists of two concentric spherical shells. The outer radius of the inner shell is a=0.43 mm and the inner radius of the outer shell is b=2.2 mm . (a) What is the capacitance C of this capacitor?
7. ### Phyisics

1. Two concentric conducting spherical shells have radii of 0.126 m. and 0.225 m. The inner sphere bears a charge of -8.00E-08 C. An electron escapes from the inner sphere with negligible speed. Assuming that the region between the …
8. ### physics

You have two cylindrical solenoids, one inside the other, with the two cylinders concentric. The outer solenoid has length ℓouter = 400 mm, radius R outer = 50 mm, and N outer = 2000 windings. The inner solenoid has length ℓinner …
9. ### science

Two concentric conducting spherical shell have raddii R1=0.145m and R2 =0.207m. The inner sphere with negligible speed. Assuming that the region between the sphere is a vacuum, compute the speed with which the electron strikes the …
10. ### physics

two concentric conducting spherical shells have radii R1=0.145m and R2=0.207m the inner spheres with negligible speed, Assuming that the region between the spheres is a vacuum compate the speed with which the electron stricks the outer …

More Similar Questions