Solve the Problem $E$ , That Can Be Placed Across a Resistor Is Given

question 389

Multiple Choice

Solve the problem.
-The maximum number of volts, $E$ , that can be placed across a resistor is given by the formula $E = \sqrt { P R }$ , where $P$ is the number of watts of power that the resistor can absorb and $R$ is the resistance of the resistor in ohms. Solve this equation for $R$ . Use the result to determine the resistance of a resistor if $P$ is $\frac { 1 } { 4 }$ watts and $E$ is 60 volts.

• A) \(\mathrm { R } = \frac { \mathrm { E } ^ { 2 } } { \mathrm { P } ^ { 2 } } ; 57,600 \mathrm { ohms }\)
• B) \(\mathrm { R } = \mathrm { E } ^ { 2 } \mathrm { P } ; 14,400 \mathrm { ohms }\)
• C) \(\mathrm { R } = \mathrm { E } ^ { 2 } \mathrm { P } ^ { 2 } ; 57,600\) ohms
• D) \(\mathrm { R } = \frac { \mathrm { E } ^ { 2 } } { \mathrm { P } } ; 14,400 \mathrm { ohms }\)

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