Series and Parallel Circuit Rules

Steps:

• In parallel circuits, voltage is equal across all branches, equal to supply voltage.
• Current in parallel divides based on resistance via I = V/R, so different for different R.
• In series circuits, current is identical through all resistors.
• Voltage in series distributes as V = I*R, so different for different R.

The question is ambiguous because options C and D are identical, both incorrectly stating same voltage in series.

Why B is correct:

• Not applicable; B is incorrect as parallel voltage is same by definition (Kirchhoff's voltage law).

Why the others are wrong:

• A: Current differs in parallel branches for different resistances.
• C: Voltage differs in series, proportional to each R (Ohm's law).
• D: Identical to C, so also wrong.

Final answer: None