A parallel-plate capacitor,with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become
A) C
B) C/7
C) 7C
D) 14C
Answer: C) 7C
Explanation:
As the capacitance is charged by the factor equal to the value of dielectric constant, Hence, C’ = kC = 7C
Due to an acceleration of 1 , the velocity of a body increases from 5 m/s to 10 m/s in a certain period. Find the displacement (in m) of the body in that period.
A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.