Question

which symbol and unit of measurement are used for voltage?
○ symbol: v; unit: a
○ symbol: r; unit ω:
○ symbol: v; unit: v
○ symbol: r; unit: v

Explanation:

To determine the correct symbol and unit for voltage, we recall:

• Voltage (electric potential difference) is represented by the symbol \( V \) (or sometimes \( \Delta V \), but \( V \) is standard for the quantity).
• The unit of voltage is the volt, abbreviated as \( V \).

Now analyze the options:

• "symbol: \( V \); unit: \( A \)": \( A \) is amperes (current), incorrect.
• "symbol: \( R \); unit \( \Omega \)": \( R \) is resistance, \( \Omega \) (ohms) is resistance unit, incorrect.
• "symbol: \( V \); unit: \( V \)": Matches voltage’s symbol (\( V \)) and unit (volt, \( V \)).
• "symbol: \( R \); unit: \( V \)": \( R \) is resistance, unit mismatch, incorrect.

Answer:

symbol: \( V \); unit: \( V \) (the third option in the list)