Answer:

Explanation:
GIVEN DATA:
Charge 3 nC
Radius of ring is 10 cm
A point charge 1 nC
Distance of point charge is 2.5 m
We know that voltage is calculated as


V = 270 V
At x = 2.5m

r = 1.581 m

V(2) = 10.801 V
Work done is calculated as
W= q(dV)


(100, 108)
Due to
1.2x90=108
100, 108
Answer:
w'=(1/2)w
Explanation:
In order to calculate the angular velocity of the second wheel, you use the following formula:
(1)
v: speed of the wheel 1 = speed of the wheel 2
r: radius of the wheel 1
For the second wheel you have:
r'=2r
You replace this value of r' in the following equation:

The angular velocity of the second wheel is one half of the angular velocity of the first wheel