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The range of frequencies used in induction heating is

The range of frequencies used in induction heating is Correct Answer more than 1 kHz

Induction heating:

  • Induction heating is also known as high-frequency heating.
  • The induction heating process makes use of currents induced by electromagnetic action in the material to be heated (transformer principle).
  • The main difference between low and high-frequency heating is that in the former case it is transferred either by convection, conduction, or radiation whereas in the latter case conversion of electromagnetic energy into heat energy takes place in the material itself.
  • Heat transfer by conventional methods is very small.
  • Induction heating is used in the frequency range of more than 1 kHz.

 

​Advantages:

  • High speed of heating.
  • The thermal capacity of the furnace being small, no warm-up time is required.
  • Well suited for intermittent operation.
  • Can be used for heating and welding.

Related Questions

Which of the following statements are correct? 1. A lowpass filter passes low frequencies and stops high frequencies. 2. A highpass filter passes high frequencies and rejects low frequencies 3. A bandpass filter passes frequencies within a frequency band and attenuates frequencies outside the band. 4. A bandstop filter passes frequencies within the band and blocks/attenuates frequencies outside a frequency band.
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: An induction motor can, therefore, be made without electrical connections to the rotor. B: Three-phase squirrel-cage induction motors are widely used as industrial drives because they are self-starting, reliable and economical. C: An induction motor's rotor can be either wound type or squirrel-cage type. D: An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding.
Consider the following statements: i. The lock range of a PLL is the difference between the highest and lowest frequencies that the PLL can remain in lock onto. ii. The capture range of a PLL is the range of frequencies that the voltage controlled oscillator of a PLL can produce. iii. PLL can be used to synchronize the horizontal and vertical oscillators of TV receivers to incoming sync pulses. Which of the above statements is/are correct?
A filter that passes all frequencies lying outside a certain range, while it attenuates all frequencies between the two designated frequencies is called?
The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature of air entering the heating coil, td₂ = Dry bulb temperature of air leaving the heating coil, and td₃ = Dry bulb temperature of heating coil)
The bypass factor (B.P.F.) in case of sensible heating of air is (Where td1 = Dry bulb temperature of air entering the heating coil, td2 = Dry bulb temperature of air leaving the heating coil and td3 = Dry bulb temperature of heating coil)
Consider the following statement with reference to Popper's solution of the problem of induction, and mark the correct option.
1. There is no rationally justifiable method of induction.
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Choose the correct answer:
Examine the following statements relating to induction and identify those which are either true or false.
1. Induction today is renamed as empolyee orientation programme.
2. It is also known by the term 'on boarding'.
3. It is for the purpose of socialising the new employees.
4. Informal induction is better than formal induction.
A filter that passes frequencies between two designated cut-off frequencies and attenuates all other frequencies is called?
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