A6.0-μf air-filled capacitor is connected across a 100-v voltage source. after the source fully charges the capacitor, the capacitor is immersed in transformer oil (of dielectric constant 4.5). how much additional charge flows from the voltage source, which remained connected during the process?

Explanation:

The initial charge stored on the capacitor is given by

where

is the initial capacitance

V = 100 V is the potential difference across the capacitor

Solving the equation,

The charge stored in the capacitor when inserting the dielectric is

where

k = 4.5 is the dielectric constant

Substituting,

So the additional charge is

Explanation:

Value of the cross-sectional area is as follows.

        A =

           = 3.45

The given data is as follows.

          Allowable stress = 14,500 psi

          Shear stress = 7100 psi

Now, we will calculate maximum load from allowable stress as follows.

                       =

                       = 50025 lb

Now, maximum load from shear stress is as follows.

                      =

                      = 48990 lb

Hence, will be calculated as follows.

                  = 48990 lb

Thus, we can conclude that the maximum permissible load is 48990 lb.