Two metal spheres of different sizes are charged such that the electric potential is the same at the surface of each. sphere a has a radius 2 times that of sphere b. let qa and qb be the charges on the two spheres, and let ea and eb be the electric-field magnitudes at the surfaces of the two spheres. what is the ratio qb/qa? what is the ratio eb/ea?

Explanation:

Given

Radius of A is twice of B i.e.

Also Potential of both sphere is same

thus

(b)Ratio of

Electric Field is given by

thus ----1

----2

Divide 2 by 1

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

as technology advances, new experiments often expose problems in accepted theories. c

hope i

-lavira: )