9. Calculate the capacitance between two parallel plates each of which is 100 cm? and 2 mm apart in air. a. 0.443 uuF b. 0.515 μμF c. 0.452 µµF d. 0.502 μμF 10. Calculate the magnitude of the electric field at a point that is 30 cm from a point charge Q = -3.2 x 10-6 c. 3.2 x 10-6 N/C b. 3.0 x 105 N/C c. 2.8 x 10°N/C d. 2.4 x 105 N/C а.

What is a dielectric material? Give two examples.

Q5/ An electric field of 8.5 x 105 V/m is desired between two parallel plates each of (7 cm x 8 cm) and separated by 3.5 mm of air. What charge must be on each plate? What is the value of energy stored in the capacitor? A dielectric insulator has been inserted between the two plates.What is the value of K for this insulator in order to double the charge on the plates?

Question 4