Question

Q4. The following potential differences were measured in a circuit: E is at the same potential as ground and -25 volts wrt D D is -15 volts wrt C C is -10 volts wrt B B is -30 volts wrt A What are the potentials at B, C and D wrt ground. What is the potential difference of A wrt C. What is the potential difference of C wrt A. What is the potential difference of ground wrt B i) ii) iii) iv)​

Answer 1

We can determine the potentials at B, C, and D with respect to ground by adding up the potential differences from each point to ground:

• The potential at B with respect to ground is -30 volts.
• The potential at C with respect to ground is -10 volts.
• The potential at D with respect to ground is -15 volts.

To determine the potential difference of A with respect to C, we subtract the potential at C from the potential at A:

• The potential difference of A with respect to C is -20 volts (since the potential at A is -30 volts and the potential at C is -10 volts, so A is 20 volts less than C).

To determine the potential difference of C with respect to A, we subtract the potential at A from the potential at C:

• The potential difference of C with respect to A is +20 volts (since the potential at C is -10 volts and the potential at A is -30 volts, so C is 20 volts greater than A).

To determine the potential difference of ground with respect to B, we subtract the potential at B from the potential of ground (which is assumed to be zero):

• The potential difference of ground with respect to B is +30 volts (since the potential at B is -30 volts, so ground is 30 volts greater than B).