Page 92 - Basic Electrical Engineering
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Solution:
The coefficient of coupling, K is given as
Mutual inductance M is calculated as
Example 1.19 Calculate the capacitance of a capacitor made of two parallel
2
plates of 3 m having a distance between the plates of 1 cm. The dielectric is
air between the plates.
Solution:
Note that although the area of the plates is large, the value of capacitance is
very small. Instead of air as the dielectric, if we place mica or paper between
the plates, capacitance will increase. If we also reduce the distance between
the plates, the capacitance will increase.
Example 1.20 A 25 microfarad capacitor is switched on to a time varying
voltage source. The voltage wave is such that voltage increases at the rate of
10 V per second. Calculate the charge accumulated in the capacitor at an
elapse of 1 second and the amount of energy stored in the capacitor.
Solution:
