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The temperature at which water boils depends mainly on ____________?

A. Air temperature
B. Relative humidity
C. Air pressure
D. Air density
E. The specific heat of air

Melanoma (skin cancer) is associated with ______________?

A. ozone accumulation
B. ozone depletion
C. acid rain
D. allergens

The earth’s atmosphere is divided into layers based on the vertical profile of __________?

A. Air pressure
B. Air temperature
C. Air density
D. Wind speed

A step – down choppers can be used in___________?

A. Electric traction
B. Electric vehicles
C. Machine tools
D. All of these

The output current in PWM DC – DC converters is equal to___________?

A. Average value of the output inductor current
B. Product of an average inductor current and a function of duty ratio
C. Either A. or B.
D. None of these

The opposite of susceptibility is___________?

A. Immunity
B. Emission
C. Interference
D. Electromagnetic compatibility

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