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Q. Velocity of electomagnetic waves in a medium depends upon
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Q. Which one of the following is abundantly present in the atmosphere?
Q. Sound becomes hazardous noise pollution at decibels?
Q. Purpose of an optical filter is to
Q. An instrument that records earthquakes is
Q. A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.
Q. The operation of the electric generator and motor is based on the interaction between
Q. Transformer cooling and insulation oil must be of ?
Q. A temperature at which both the fahrenheit and the centigrade scales have the same value is
Q. Holes in a semiconductor behave as though they have
Q. A diagnostic technique commonly known as 'Ultrasound' is based on recording
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