Base your answers to questions 69 through 72 on the diagram...

Base your answers to questions 69 through 72 on the diagram below, which shows three resistors connected in parallel to a 300 volt direct-current source. A voltmeter connected between points $A$ and $B$ will have a reading of (A) $20 \mathrm{~V}$ (B) $50 \mathrm{~V}$ (C) $100 \mathrm{~V}$ (D) $300 \mathrm{~V}$

Base your answers to questions 69 through 72 on the diagram below, which shows three resistors connected in parallel to a 300 volt direct-current source.
A voltmeter connected between points $A$ and $B$ will have a reading of
(A) $20 \mathrm{~V}$
(B) $50 \mathrm{~V}$
(C) $100 \mathrm{~V}$
(D) $300 \mathrm{~V}$

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Key Concepts

Parallel Circuits

In a parallel circuit, all components are connected directly across the same two nodes, which means that each component receives the full voltage of the source. This concept is fundamental in circuit analysis, as it simplifies understanding voltage distribution in the circuit.

Voltage Measurement

A voltmeter measures the potential difference between two points in a circuit. When connected across parameters in a parallel configuration, it reads the same voltage that is applied across each individual component.

Direct Current (DC) Sources

DC voltage sources provide a constant voltage over time, which means the potential difference they create across circuit elements remains fixed. This is crucial for ensuring predictable behavior in circuits using parallel connections.

Resistors

Resistors are components that impede current flow and cause voltage drops in circuits. In parallel arrangements, even though each resistor carries a different portion of the total current, the voltage across each resistor remains equal to the source voltage.

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