Question

The resistance of a heater is 130.45 2. Find the wattage of the heater if it draws 1850 mA from the supply mains ?​

Answer 1

Answer:

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Explanation:

Rate of generating heat is equal to the power used by the heater.

By Joule's Law of heating,

P=I

2

R

=15

2

×8

=1800 W

Hence, rate of generation of heat is 1800W.

Total amount of heat generated, E=Pt

E=1800×2=3.6 kWh

Answer 2

Answer:

446.45 Watt

Explanation:

R = 130.45 ohm

Current = 1850 mA = 1.850 A

Power (wattage) = I²R

=> 1.85 × 1.85 × 130.45

=> 446.45 watt

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