here the charge density of metal plate is given as
now the electric field is given Gauss law
now here E = constant
so we will have
Since total area on both sides of plate will be double and becomes 2A
Now if we will find the electric field inside the metal plate
Then as we know that total charge inside the plate will always be zero
so we have
Answer:
t = 5.89 s
Explanation:
To calculate the time, we need the radius of the pulley and the radius of the sphere which was not given in the question.
Let us assume that the radius of the pulley () = 0.4 m
Let the radius of the sphere (r) = 0.5 m
w = angular speed = 150 rev/min = (150 × 2π / 60) rad/s = 15.708 rad/s
Tension (T) = 20 N
mass (m) = 3 kg each
Substituting values: