Question

Select the correct answer from each drop-down menu.

Rewrite the formula to find voltage.
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
volts.
(First drop box V=PR/V=(PR)^(1/2)/V=P^2R second drop box 16 5 4

Answer 1

`we \: have \: ohms \: law \: h = {i}^(2) rt \\ (h)/(t) = {i}^(2) rt / t = p \\ p = {i}^(2) r....(1) \\ we \: have \: v = ir \\ i = (v)/(r) .....(2) \\ put \: (2) \: in \: (1) \\ then \: p = { ((v)/(r)) }^(2) r \\ p = \frac{ {v}^(2) }{r} \\ v = √(pr) = {(pr)}^{ (1)/(2) } \\ 2) \\ here \: r = 32 \: and \: p = .5 \\ then \: v = √(32 * .5) \\ = √(16) = 4volt \\ thank \: you`