Question

The electric current as a function of voltage of a wire is

presented by the graph. What is the power dissipated in the
resistor when the applied voltage is 5 V?

Answer 1

To calculate the power dissipated in a resistor when the applied voltage is 5V, find the corresponding current from the graph and multiply it by the voltage.

Step-by-step explanation:

The power dissipated in a resistor can be calculated using the formula P = IV, where P is the power, I is the current, and V is the voltage. In this case, when the applied voltage is 5V, you need to find the corresponding current from the given graph. From the graph, find the point where the voltage is 5V and read the corresponding current on the y-axis. Multiply the current by the voltage to calculate the power dissipated in the resistor.

Answer 2

15 W

Explanation:

According to the graph, when the voltage is 5 V, the current flowing is equal to 3 A. The definition of power dissipated P is

P = VI = (5 V)(3 A) = 15 W