30. A wooden board of 30cm X15cm X 2cm is to be heated from 30°C to 180°C in 10 minutes by dielectric heating using 40MHZ supply. Specific heat of wood is 0.35 and density 0.55gm/ccm, relative permeability = 5 and power factor 0.05. Estimate the voltage across specimen and current during heating. Assume efficiency as 90%.
30. A wooden board of 30cm X15cm X 2cm is to be heated from 30°C to 180°C in 10 minutes by dielectric heating using 40MHZ supply. Specific heat of wood is 0.35 and density 0.55gm/ccm, relative permeability = 5 and power factor 0.05. Estimate the voltage across specimen and current during heating. Assume efficiency as 90%.
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![30.
A wooden board of 30cm X15cm X 2cm is to be heated from 30°C to 180°C in 10 minutes by dielectric
heating using 40MHZ supply. Specific heat of wood is 0.35 and density 0.55gm/ccm, relative
permeability
= 5 and power factor = 0.05. Estimate the voltage across specimen and current during
heating. Assume efficiency as 90%.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2163eb97-caf4-41e8-b13a-324de8a2c3b6%2F125a37df-f90b-46ff-9abd-15addc65ccbc%2F7l903dp_processed.jpeg&w=3840&q=75)
Transcribed Image Text:30.
A wooden board of 30cm X15cm X 2cm is to be heated from 30°C to 180°C in 10 minutes by dielectric
heating using 40MHZ supply. Specific heat of wood is 0.35 and density 0.55gm/ccm, relative
permeability
= 5 and power factor = 0.05. Estimate the voltage across specimen and current during
heating. Assume efficiency as 90%.
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