Answer to Question #172170 in Electric Circuits for JohnDoe

Question

2.7 Find the power dissipated in the following resistors

1. 100kΩ resistor with a 10A of current
2. 45Ω resistor with a 25mA of current
3. 1kΩ resistor with a 75mA of current

Answer 1

1) $P_1=I_1^2R_1=10^2\cdot100000=10\cdot10^6\ (J)=10\ MJ$

2) $P_2=I_2^2R_2=0.025^2\cdot45=0.028\ (J)$

3) $P_3=I_3^2R_3=0.075^2\cdot1000=5.625\ (J)$