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

Question

30-08-2021
Mathematics

contestada

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

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Answer:

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