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the formula for calculating power is:
select one:
a. p = v x i
b. p = r x i
c. p = v x r
d. p = e x v

Explanation:

Step1: Recall Power Formula

Power \( P \) in an electrical circuit is calculated by multiplying voltage \( V \) and current \( I \).
$$P = V\times I$$

Step2: Analyze Other Options

• Option b: \( P = R\times I \) is incorrect. The correct formula involving \( R \) is \( P=I^{2}R \).
• Option c: \( P = V\times R \) is incorrect.
• Option d: \( P = E\times V \) is incorrect. Energy \( E = P\times t \), not \( P = E\times V \).

Answer:

A. \( P = V\times I \)