Work package. Hope this helps!
Answer:
<em>-2 units of charge</em>
Explanation:
charge on A = Qa = -6 units
charge on B = Qb = 2 units
if the spheres are brought in contact with each other, the resultant charge will be evenly distributed on the spheres when they are finally separated.
charge on each sphere will be = 
charge on each sphere =
=
= <em>-2 units of charge</em>
Answer:
B. 75V
Explanation:
The formula for Voltage across and Inductor is given as:
Vr.m.s = Ir.m.s × XL
Where
Ir.m.s : Current across the inductor
XL = 2πFL
In the question we were given values
Ir.m.s = 0.20A
F = 750Hz
L = Inductance = 0.080H
Vr.m.s = 0.20 × ( 2 × π× 750Hz × 0.080H)
Vr.m.s= 0.20 × 376.99111843
Vr.m.s = 75.389223686volts
Approximately = 75volts
Therefore, the voltage across the inductor is 75 volts.