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Doctors Medicines MCQs Q&A

  1. Dielectric heating
  2. Arc heating
  3. Induction heating
  4. Eddy current heating
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1 Answers

Option 1 : Dielectric heating

Induction heating is a method of heating conductive material by subjecting it to an alternating electromagnetic field, usually at frequencies between 100 and 500 kHz.

Arc heating is the heating of matter by an electric arc. The matter may be solid, liquid, or gaseous. When the heating is direct, the material to be heated is one electrode; for indirect heating, the heat is transferred from the arc by conduction, convection, or radiation.

Dielectric heating (Capacitance heating) is the method of heating non-conductive materials. The material to be heated is placed between two electrodes, to which a high-frequency energy source is connected. The oscillating field passes through the material and as the field direction changes, the polarisation of individual molecules reverses rapidly, causing friction and hence heat. The higher the frequency, the greater the movement. Typically, frequencies in the range 5 MHz to 80 MHz are used. This technology is used in Wood Gluing, RF Drying, and Plastic Welding.
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Related Questions

The question below consists of a set of labelled sentences in which first and the last sentence is given. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. S1- Non-Formal Adult Education is an education provided at the workplace or at some community centre but not in a classroom. P- Non-formal education doesn’t have a set curriculum, but it is conducted under the supervision of trained professionals. Q- Though it doesn’t allow a formal degree or diploma, it is very useful in developing specific skills and increasing the productivity of a person. R- A desire to learn is the driving force behind non-formal adult education. S- Some of the examples of non-formal Adult Education are- voluntarily teaching the women of a community to stitch, producing bags, making pickles, producing honey, farming or any such sustainable activity. S6- They main focus of a non-formal education is the development of skills and capabilities.?
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