If Y Varies Directly as X, Find the Direct Variation $\frac { 1 } { 16 }$

question 262

Multiple Choice

If y varies directly as x, find the direct variation equation for the situation.
-For a resistor in a direct current circuit that does not vary its resistance, the power that a resistor must dissipate is directly proportional to the square of the voltage across the resistor. The resistor must dissipate $\frac { 1 } { 16 }$ watt of power when the voltage across the resistor is 7 volts. Find the power that the resistor must dissipate when the voltage across it is 14 volts.

• A) \(\frac { 1 } { 4 }\) watt
• B) \(\frac { 7 } { 16 } \mathrm { watt }\)
• C) \(\frac { 49 } { 16 }\) watts
• D) \(\frac { 1 } { 8 } w a t t\)

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Definitions:

Input Device

A hardware or component that allows information to be provided to a computer or machine, such as a keyboard, mouse, or sensor.

Output Device

An apparatus that converts electrical signals into physical actions or representations, such as actuators, motors, or displays.

Actual Scan Time

The real time taken for a PLC to complete one cycle of reading inputs, executing the program, and updating outputs.

PLC's Memory

The storage area in a Programmable Logic Controller where data, instructions, and system information are kept for processing and control tasks.