Answer:
Explanation:
The total charge in the disks
must be conserved before and after bringing them together.
Lets equate the sum of the initial charge with the sum of the final for the disk:
So, the initial charges must sum +17 μC.
Now, as there are no charges over +17 μC, this means that both charges must be positive.
As the only positive charges are and
, this disk must be the ones we are looking for. And, as we can see, they sum 17 μC:
Answer:
The number of turns of the inductor is 2000 turns.
Explanation:
Given;
emf of the inductor, E = 0.8 V
the rate of change of current with time, dI/dt = 10 A/s
steady current in the solenoid, I = 0.2 A
flux per turn, Ф = 8.0 μWb per
Determine the inductance of the solenoid, L
E = L(dI/dt)
L = E / (dI/dt)
L = 0.8 / (10)
L = 0.08 H
The inductance of the solenoid is given by;
Also, the magnetic field of the solenoid is given by;
I is 0.2 A
But Ф = BA
Therefore, the number of turns of the inductor is 2000 turns.