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blagie [28]
3 years ago
14

A 120VAC electric heater has two resistive heating elements that can be switched separately in and out, in series or parallel. F

ind the values of the two resistors if the minimum power drawn by the heater is 300 watts and the maximum is 1200 watts.
Physics
1 answer:
yKpoI14uk [10]3 years ago
6 0

Answer:

The values of the two resistors are 48 ohms and 12 ohms.

Explanation:

Power (P) = Voltage^2 (V^2) ÷ Resistance (R)

R = V^2 ÷ P

The minimum power drawn by the heater is 300 watts

Voltage is 120 V

R = 120^2 ÷ 300 = 14,400÷300 = 48 ohms

The maximum power drawn by the heater is 1200 watts

R = 120^2 ÷ 1200 = 14,400 ÷ 1200 = 12 ohms

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