Question

The formula for electrical power (P, in watts) is where V is the voltage in volts and R is the resistance in ohms. For a particular brand of water heater, R is 32 ohms and P is 0.5 watts. The formula to find V is , and the voltage at which the heater operates is? (in volts)

A. 16 volts
B. 5 volts
C. 4 volts

Answer 1

ik #1 is NOT V= PR #2 is V = 4 volts tho and if i am correct the third dropdown menu one is correct on #1

Explanation:

dont really have an explanation

Answer 2

The answers are √(P * R) and V = 4 volts.

The formula for electrical power is:
P = V²/R

Therefore:
V² = P * R
V = √(P * R)

If we know that:
P = 0.5 watts
R = 32 ohms

Then:
V = √(0.5 * 32)
V = √(16)
V = 4 volts