What is Gamma air?

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What is Gamma air?

“Gamma” is just a number whose value depends on the state of the gas. For air, gamma = 1.4 for standard day conditions. “Gamma” appears in several equations which relate pressure, temperature, and volume during a simple compression or expansion process.

Why air is a bad conductor?

In a gas molecules have to scatter off molecules to exchange energy in larger distances, so the probability of transfer is much smaller. Air is a bad conductor because, to conduct heat current molecules should absorb heat and transmit it to neighbor by vibrating.

What happens when air is ionized?

Air ionization neutralizes static charge on insulated and isolated objects by producing a balanced source of positively and negatively charged ions. Whatever static charge is present on objects in the work environment will be reduced and neutralized by attracting opposite polarity charges from the air.

At what voltage does air break down?

Although air is normally an excellent insulator, when stressed by a sufficiently high voltage (an electric field of about 3 x 106 V/m or 3 kV/mm), air can begin to break down, becoming partially conductive.

What happens at breakdown voltage?

If reverse bias is made too high, the current through PN junction increases abruptly and the voltage at which this phenomenon occurs is called breakdown voltage . At this breakdown voltage , the crystal structure breaks down. When reverse bias is increased, the electric field at the junction also increases.