A 1500 Watt heater is connected to a 120V power source. A) How much power is bei

Question

A 1500 Watt heater is connected to a 120V power source. A) How much power is being generated? B) How much heat energy would the unit produce in 2 hours? C) How much power would be produced if the voltage source is switched from 120 V to 90V? A 1500 Watt heater is connected to a 120V power source. A) How much power is being generated? B) How much heat energy would the unit produce in 2 hours? C) How much power would be produced if the voltage source is switched from 120 V to 90V? A) How much power is being generated? B) How much heat energy would the unit produce in 2 hours? C) How much power would be produced if the voltage source is switched from 120 V to 90V?

Explanation / Answer

Current used I = W/V = 1500/120 = 12.5A
R = V/I = 120/12.5 = 9.6 ohms

Energy Produced = 1500 W x (2 x 60 x 60) s = 10,800,000 Joules
= 10.8 MJ
= 3000 WHr

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