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A resistor with an unknown value (R) has 9V applied to it from a battery....

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A resistor with an unknown value (R) has 9V applied to it from a battery. The resistor wastes 1.34 W of power as heat.a. What is the current flowing through the resistor?b. What is the resistance of R?c. If R was powered by a 12V battery, how much power will be dissipated as heat?d. Can you think of an example were we use resistive elements for heating?

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