Question

If the potential of a is 10v, then potential of b is

Answer 1

Answer:

 If potential of A is 10V, then potential of B is -

Explanation:

Answer 2

Answer:

answer is 50/3 v

Explanation:

Here we have a circuit with three capacitors having capacitance 1μF each. The potential at a particular point is given and we have to find the potential at another point. For that, we have to find whether the capacitors are in series or parallel combination and using equivalent circuits we have to find the potential

Here we have three capacitors of 1μF each. Let us consider the equivalent circuit as shown below

We can see that two of the capacitors are connected in parallel and we can write the equivalent capacitance of these two capacitors as,

C1=1μF+1μF=2μF

The third capacitor is in series connection with the two capacitors that are in parallel. Now the equivalent circuit is as shown below,

The potential across a capacitor is given by,

V=QC

where Q stands for the charge stored in the capacitor and C stands for the capacitance of the capacitor.

From this, we can write,

Q=VC

In a series combination, each capacitor carries the same amount of charge.

Since the two capacitors are in series connection the total capacitance can be written as,

1C=1C1+1C2

The capacitance C1=2μF and C2=1μF

Putting these values in the above equation, we get

1C=12+11=32

The capacitance, C=2/3

The potential at A, V=10V

Now the charge can be written as,

Q=2/3×10=20/3μC

The voltage across the 1μF capacitor can be written as,

VB−VA=20/3

where VB is the potential at the point B and VA is the potential at the point A.

Substituting VA=10V in the above equation we get

VB=20/3+10=50/3V

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