Question

A heater is supplied with a dc voltage of 146.0 V and delivers 1.00 kW of...

A heater is supplied with a dc voltage of 146.0 V and delivers 1.00 kW of heat. What rms voltage must an ac voltage source provide to deliver the same amount of heat? Tries 0/10 What is the alternating current delivered to the heater? Tries 0/10 What is the amplitude of the ac voltage? Tries 0/10 What is the peak-to-peak voltage of the ac voltage?

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Answer #1

a) We know the rms voltage of an AC source is the DC voltage.

The arms voltage must an AC voltage source provide to deliver the same amount of heat is Vrms=146.0 V.

b) Let the alternating current delivered to the heater is I.

  

  

c) Let the amplitude of the ac voltage is Vpeak.

We know the amplitude of an ac voltage is the peak voltage

  

d) Let the peak-to-peak voltage is Vpp.

We know peak-to-peak voltage is

  

     

  

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