according to joules law of heating mention the factors on which heat produced in a resistor depends according to this law write the formula used to calculate the heat produced
Answers
Answer:
→ If an electric circuit is purely resistive, the source of energy continually get dissipated entirely in form of heat. This is known as heating effect of electric current.
As, E = P×T ∝ VIt {E = H}
Heat produced, H = VIt {V = IR}
Or, Heat produced, H = I2Rt
Joule’s Law of Heating Effect of Electric Current
→ It states that the heat produced in a resistor is (i) directly proportional to square of current, H ∝ I2
→ It is directly proportional to resistance for a given current, H ∝ R
→ It is directly proportional to time for which current flows through the conductor, H ∝ t.
So, H = I2Rt
→ Heating effect is desirable in devices like electric heater, electric iron, electric bulb, electric fuse, etc.
→ Heating effect is undesirable in devices like computers, computer monitors (CRT), TV, refrigerators etc.
→ In electric bulb, most of the power consumed by the filament appears a heat and a small part of it is radiated in form of light.
Explanation:
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