The resistance of the first resistor is 3 Ohm, and the second one is 10 Ohm Which resistor will heat up more

| August 30, 2021 | education

The resistance of the first resistor is 3 Ohm, and the second one is 10 Ohm Which resistor will heat up more when a current of 5 mA flows for 5 minutes 1) the first resistor 2) the second resistor 3) both resistors will heat up the same way.

It is known that the resistance of the first resistor R1 = 3 ohms, and the second R2 = 10 ohms. To determine which resistor will heat up more strongly when a current flows I = 5 mA = 5 ∙ 10 ^ (- 3) for a time t = 5 min = 300 s, we use the Joule-Lenz law. According to the law, the amount of heat – Q released in a conductor with a current – I is directly proportional to the square of the current in it, its resistance – R and the time this current flows through the conductor – t, that is: Q = I ^ 2 ∙ R ∙ t … Since I and t are the same for both conductors, more heat will be generated on the resistor with higher resistance.
Answer: the second resistor will heat up more



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