What is the voltage across the 6 μf capacitor, Vab = 20V?

Hmmm. I'd kinda like to know a little more about the circuit ...

To determine the voltage across the 6 μF capacitor, we need to know the charge stored on the capacitor. The relationship between the voltage across a capacitor and the charge stored on it is given by the formula:

Q = C * V

where Q is the charge, C is the capacitance, and V is the voltage. Rearranging the formula, we get:

V = Q / C

Now, we know the value of the voltage (V = 20V) and the capacitance (C = 6 μF). Plugging these values into the formula, we can solve for the charge (Q):

Q = C * V
Q = 6 μF * 20V

To perform this calculation, we need to convert the capacitance from microfarads (μF) to farads (F). Since 1 microfarad is equal to 1 × 10^-6 farads, we can convert the capacitance as follows:

C = 6 μF = 6 × 10^-6 F

Now we can substitute the values of C and V into the equation to calculate the charge:

Q = (6 × 10^-6 F) * (20V)

Performing the multiplication, we find:

Q = 0.00012 C

Therefore, the charge stored on the 6 μF capacitor is 0.00012 Coulombs (C).