Question

H1P3: Poor Workmanship
Joe wants to heat his 12'X20' workshop with electric heat. He has hired the HACME electrician company to build the system. They propose to use three W 240V baseboard heaters to provide a total heating capacity of W. (A heater is basically a resistor. This is not quite true, because there is a thermostatic switch incorporated into the heater and because the resistance of a heater varies a bit with its temperature. But we will use a linear resistor as a model of a heater.)
In the proposed system the heaters are connected in parallel with the 240V 60Hz AC po

Answer 1

I'm having trouble with that too, post the whole question with diagrams and see if someone can solve it.

Answer 2

what is the question?

Answer 3

oe wants to heat his 12'X20' workshop with electric heat. He has hired the HACME electrician company to build the system. They propose to use three W 240V baseboard heaters to provide a total heating capacity of W. (A heater is basically a resistor. This is not quite true, because there is a thermostatic switch incorporated into the heater and because the resistance of a heater varies a bit with its temperature. But we will use a linear resistor as a model of a heater.)
In the proposed system the heaters are connected in parallel with the 240V 60Hz AC power line (modeled by a voltage source) as shown in the diagram:
Remember (from exercise S1E3: AC POWER) that AC power-line voltages and currents are specified as RMS values. So 120V AC heats a given resistance exactly as much as 120V DC would heat that same resistance.
How much current is expected to be drawn from the power line by this heating system when all three heaters are on?

Answer 4

in the diagram, 3 heaters are connected in parallel.